This article will be useful for anyone planning to display the output of Keynote on an external screen. Chapters / sections only meant for advanced users (engineers, programmers – particularly those of Apple in charge of bugfixing -; see Chapter 2) or ones with jailbroken devices (Section 1.1) are each clearly marked as such; they can be safely skipped by other users. NOTE: the article contains a lot of information on video / TV output in general and the multitasking / backgrounding JB tweaks, which may be of interest to not only Keynote users.
Here at MacRumors, I've been asked to elaborate on the relative quality of the different technologies and configurations one can use while outputting to external displays from Keynote. As I have both the necessary (pretty expensive) equipment to properly assess the quality of even high-resolution video signals and, being an engineer myself, also know a little bit about video from the engineering standpoint, I've made some serious tests never before, it seems, done by anyone else to find out how you can present your audience with the best possible image quality.
1. Introduction
Apple's Keynote application (AppStore link; Universal; $9.99) is by far the most widely used iOS application to play back presentations. In this writeup, I present you with a (I think) complete discussion of everything related to displaying its contents on an external screen / projector (from now on, for brevity, “TV”).
Keynote is one of the (unfortunately) very few applications to have native support for TV output. This has both advantages and disadvantages over the (with A5+ CPU-based iDevices) standard mirroring. The advantages are as follows:
1) it's supported on practically all (A4+) CPU and cable (any cable will do) configurations, meaning you'll be even able to show your presentations on an iPad 1, iPhone 4 or iPod touch 4G, even if you only have a composite or component cable. (Of course, the image quality delivered by these two cables, particularly that of the composite one, isn't anything to write home about.) With mirrored-only output, only A5+ devices and only the HDMI and the VGA adapters would work – no A4 CPU's and no composite / component cables.
Note that
a, Keynote doesn't seem to support (composite / component) TV out on pre-A4 but sill iOS6-compliant devices like the iPhone 3GS, while it does support these low-resolution cables on later iDevice models.
b, Wireless output via the Apple TV is only supported on iDevices with A5+ CPU's but not earlier ones. That is, don't expect a, say, iPad 1 to be able to show a presentation wirelessly over the Apple TV – you can only used wired output with these A4-based iDevices.
2) the output resolution is fully independent of that of the device it's played on. This means even an iPhone 4S, equipped with a 960x640 screen, can output Full HD (1920x1080) when used with the HDMI or the VGA adapters. With A4 devices (iPad 1, iPhone 4 or iPod touch 4G), the maximal resolution is 720p (HDMI adapters) and XGA (VGA adapter). (As usual, the composite / component cables are only capable of lower resolutions – 480p/576p or 480i/576i using the component / composite cables, respectively.)
3) the TV output can be entirely different than the one on the originating iDevice's actual screen output. This means you can display the current time or even presenter notes locally, which won't be seen by your audience.
Note that, however, you cannot just switch to another program to quickly look up something without the audience seeing it on an A5+ (that is, by default, mirroring-enabled) iDevice or without the TV output getting black (on A4 devices, that is, where there's no OS mirroring). This can only be circumvented on jailbroken iDevices – see next bullet.
4) on jailbroken devices, the app can even be sent in the background with the slideshow continuing – and, with Apple's own “Keynote Remote”, even remaining controllable. This is the subject of Section 1.1 below.
The main disadvantage is as follows: as with many other apps in the AppStore (or in iOS itself, see for example my report on the pretty bad TV out results of the built-in Photos app and Apple's $4.99 iPhoto HERE), the TV out support isn't properly tested / debugged, resulting in major resolution problems with everything Microsoft Office-based. Actually, the achievable resolution, even with the HDMI and VGA adapters, is far-far inferior to that of even the iPhone 5's mirroring mode, let alone iPads and only a little bit better than with the composite / component cables. This is a MAJOR problem, to which an entire chapter (“2. Problems With Microsoft Office Files”) is devoted below.
Another problem is Apple's not making overscan optional in any of their apps. Unfortunately, Keynote isn't an exception. Your only hope is having a way of wiring up your iDevice to the TV with a connection type where overscan is automatically switched off: VGA or, if you're lucky, HDMI-to-DVI. Please consult THIS tutorial for more info.
1.1 Playing Back Presentations In Background
As with all other iOS apps with native TV output, Keynote also stops outputting when sent to the background by pressing the Home button. (This also applies by the Apple TV's natively playing back an embedded video in full screen – see section “4. Full-screen Playback With the Apple TV”) This makes it impossible to, say, quickly look up a note by pausing the presentation without the mirrored operating system screen to be shown to your audience - assuming you use an A5+ device with, by default, enabled mirroring and with the HDMI / VGA adapters or the Apple TV; on previous devices or with the composite / component cables, a black screen will be shown. This isn't necessarily what you'd prefer – you might want to keep your OS screen or other notes to yourself and not to your public.
This in no way can be fixed unless you jailbreak.
On jailbroken devices, you can install tweaks that allow for Keynote's continuing to work when backgrounded. On iPads with iOS versions prior to iOS6, you have even two: the commercial and absolutely excellent Quasar and the free Backgrounder. (The latter is also compatible with non-iPads and even the earliest operating systems. Note that there won't be TV output with OS versions prior to 3.2.) With any iDevice running iOS6, you have only one choice: the (fortunately, pretty inexpensive) Background Manager.
All these three tweaks (I've tested them all) work just fine with Apple's own Keynote Remote ($1; link; Universal) when Keynote is backgrounded on the linked and connected-to iDevice. The following screenshot shows it running on my iPt4G, linked to two iPads and being connected to the first:
1.1.1 iOS 6: Background Manager ($1)
This brand new and absolutely excellent tweak allows for doing the same as the very similar “Backgrounder” did in iOS versions prior to iOS6: when pressing the “Home” button, the app will run as before. With apps with TV out support like Keynote, this means the title will continue outputting its content to the TV. Again, if you use Keynote Remote, you'll be able to control the slideshow even when it's in the background.
![]()
(Main Cydia page)
Configuring it is pretty simple:
1, go to Background Manager > Each App in Settings:
![]()
(as with all screenshots below, tap / click them for the large-sized original versons)
2, tap Add Item:
![]()
3, select Keynote:
![]()
4, Keynote appears in the list below Each App, with an “N” suffix (annotated below):
![]()
“N” means it Background Manager uses the native backgrounding of Keynote when you press the Home button. This is the default for everything and, with Keynote, absolutely useless in our cases (as it doesn't support background running at all). Therefore, we'll need to force Keynote to "Background" (in pre-iOS6 parlance, “Forced”) mode. Tap Keynote in the above list and select “Background” in the uppermost “Background Mode” list:
![]()
(For (ex-)users of the pre-iOS6 Backgrounder, this “Background” mode is the same as “Forced” mode in Backgrounder, “Native” being the same in both tweaks.)
Also see my posts HERE for more info & my posts on the subject. I've posted a LOT of additional info there on every aspects of multitasking - not only on using multimedia apps, but also disabling for example Mail and Safari from being kept in memory. I also recommend THIS and THIS posts.
1.1.2 Prior to iOS 6
1.1.2.1 (iPad only!) Quasar
![]()
(the screenshot, in addition to showing I've purchased this tweak, also shows the developer explains everything is run in the background)
No special settings need to be done with Quasar – it'll keep everything running in the background, even if you tap the “Close” icon in the lower left corner of the window:
![]()
1.1.2.2 Backgrounder
This free and excellent tool, as has already been mentioned, runs on everything pre-iOS6, not only on iOS5 iPads. As opposed to Quasar, it doesn't support windowing.
Setting it up is done in exactly the same way as with the iOS6+-only Background Manager – basically, the entire menu structure is the same. There is only one major difference between the two tweaks (iOS compability and price aside): it, by default, defaults to “Forced” (in Background Manager's terminology, “Background”) backgrounding, unlike Background Manager. With the latter, the Background Manager > Global menu will show the following by default:
![]()
Also note that, unlike with Background Manager, Backgrounder isn't configured from the system-level Settings app but it has its own icon on the SpringBoard.
This is why you'll need to do a bit more to properly configure it.
It's configured for forced background mode, with two exceptions (Mail and Safari). The forced mode is shown in the following screenshot (in the Global main menu):
![]()
Basically, if it's only Keynote (and/or a handful of apps) that you want to run in the background while accessing the TV output, you'll want to change this to “Native”:
![]()
Also, after this, don't forget to add Keynote with Forced mode: Overrides > Add and select Keynote in the list.
Then, select Keynote from the Overrides main menu (below, I've also annotated the “Add” icon you need to tap in the previous step):
![]()
and tap Forced:
![]()
1.2 Any Differences Between Source Devices?
I've mentioned Apple's own, stock Photos and $4.99 iPhoto application as ones also suffering from some major, TV out-specific problems (entire article). The biggest problem of those apps isn't present with Keynote, fortunately. That is, as opposed to Photos and iPhoto, you can conduct your presentation from any kind of device – there won't be much quality difference, assuming the connection is at least comparable. (That is, don't expect the composite or the component (RGB) cable to deliver as good image quality as the HDMI or VGA adapters.)
However! There is a major problem I've discovered – that of the PPT (presentation) files created by any kind of Microsoft Outlook. No matter what technology (iDevice and connection type) you use, they'll look plain awful on the external screen. This is, as has already been mentioned above, the single biggest problem with the current iOS version (1.7.2) of Keynote.
The image quality differences, assuming material created in either the Mac or the iOS version of Keynote, are directly related to the iDevice model and the connection type you use. That is,
- as is evident to readers of my previous TV out-related articles, for the best results (where you absolutely must deliver the best image quality at Full HD resolution), you will want to go for the first-generation 30-pin (non-Lightning) HDMI adapter. As has been explained HERE, the second-generation 30-pin HDMI adapter delivers somewhat worse image quality (IQ for short) in every case. So does the 30-pin VGA adapter in some (but not every!) cases. The Lightning adapters (both the HDMI and VGA ones) deliver definitely worse image quality. Even worse is that of the Apple TV, even that of the 3rd generation. Finally, the two standard-definition connection cables (composite and RGB) deliver way-way worse IQ.
- A5+-based devices should be preferred to A4-based iDevices (iPad 1, iPhone 4 and iPod touch 4G). The latter only deliver 720p or XGA maximal resolution over the HDMI and VGA, respectively. This won't be a problem if you only have an XGA or a, God forbid, SVGA (800x600) projector. With Full HD (1920x1080) or UXGA (1600x1200) ones – or even with SXGA (1280x1024) ones! -, the quality difference will be pretty much visible.
- if possible, stay away from both Lightning-based and Apple TV-based solutions. If a wired connection and using an “old” iDevice aren't problems, use them – again, preferably with the first-gen HDMI adapter or, if the projector doesn't have HDMI or DVI(-D) input, a VGA one. Incidentally, speaking of DVI(-D): as I've explained HERE in section “1.2.3.2 Driving the DVI(-D) Input via HDMI (if Present)”, you can directly connect the HDMI output of your iDevices to DVI(-D) inputs on projectors when present. As only a passive converter is needed for this, no IQ degradation will occur, as opposed to active conversion like that of HDMI -> VGA (digital-to-analog).
- don't forget: if you use the Apple TV and wireless image beaming to the TV because you prefer keeping the signal source in your hands, you may want to go for Apple's own, inexpensive ($0.99) Keynote Remote (also see Section 1.1), assuming the resolution of your projector is over SXGA and you have the necessary high-IQ adapter type to connect to it (preferably a 30-pin first-gen HDMI or, in worse case, Lightning ones. The latter will still deliver better IQ than wireless connections to the ATV). Then, you can just leave the iDevice wired to the projector and control your presentation from another iDevice – wirelessly. The best of the two worlds: excellent IQ not otherwise achievable with the ATV and still being wirelessly connected. Of course, you'll need two iDevices for this but even the oldest iDevice models like the iPhone 3GS will work just fine as a remote. (I've tested this too.)
1.3 So, You Want to See Some Examples Proving I'm Right?
(This part is technical. Non-techies may want to skip straight to Section “2. Problems With Microsoft Office Files”.)
I've created a set of examples proving everything I've stated is right. That is,
- A5+-based devices are preferable to A4-based ones,
- HDMI / VGA adapters are preferable to the composite / component cables,
- 30-pin adapters are preferable to the latest Lightning ones,
- the first-generation 30-pin HDMI is preferable to the second-generation HDMI and
- high-quality wired connections are preferable to wireless connections to the Apple TV.
I also show you the relative IQ of different iDevices' (iPad 1, 2, 3, 4, iPhone 4, 4S, 5) output, some with more than one connection type.
The full screengrabs and their crops all show our old friend, the ISO 12233 resolution chart. I've created a natively 16:9 presentation in the desktop (OS X) Keynote and dragged a 8000x4500 pixel version of the reschart (the original PNG file is HERE; alternative link) to it, filling the entire slide. The resulting presentation is HERE. I've imported the file into the client Keynote running on iOS and captured the HDMI output with a 1080p30-capable frame grabber.
Let's see the results in the order of the above bulleted list!
(continues below)
Here at MacRumors, I've been asked to elaborate on the relative quality of the different technologies and configurations one can use while outputting to external displays from Keynote. As I have both the necessary (pretty expensive) equipment to properly assess the quality of even high-resolution video signals and, being an engineer myself, also know a little bit about video from the engineering standpoint, I've made some serious tests never before, it seems, done by anyone else to find out how you can present your audience with the best possible image quality.
1. Introduction
Apple's Keynote application (AppStore link; Universal; $9.99) is by far the most widely used iOS application to play back presentations. In this writeup, I present you with a (I think) complete discussion of everything related to displaying its contents on an external screen / projector (from now on, for brevity, “TV”).
Keynote is one of the (unfortunately) very few applications to have native support for TV output. This has both advantages and disadvantages over the (with A5+ CPU-based iDevices) standard mirroring. The advantages are as follows:
1) it's supported on practically all (A4+) CPU and cable (any cable will do) configurations, meaning you'll be even able to show your presentations on an iPad 1, iPhone 4 or iPod touch 4G, even if you only have a composite or component cable. (Of course, the image quality delivered by these two cables, particularly that of the composite one, isn't anything to write home about.) With mirrored-only output, only A5+ devices and only the HDMI and the VGA adapters would work – no A4 CPU's and no composite / component cables.
Note that
a, Keynote doesn't seem to support (composite / component) TV out on pre-A4 but sill iOS6-compliant devices like the iPhone 3GS, while it does support these low-resolution cables on later iDevice models.
b, Wireless output via the Apple TV is only supported on iDevices with A5+ CPU's but not earlier ones. That is, don't expect a, say, iPad 1 to be able to show a presentation wirelessly over the Apple TV – you can only used wired output with these A4-based iDevices.
2) the output resolution is fully independent of that of the device it's played on. This means even an iPhone 4S, equipped with a 960x640 screen, can output Full HD (1920x1080) when used with the HDMI or the VGA adapters. With A4 devices (iPad 1, iPhone 4 or iPod touch 4G), the maximal resolution is 720p (HDMI adapters) and XGA (VGA adapter). (As usual, the composite / component cables are only capable of lower resolutions – 480p/576p or 480i/576i using the component / composite cables, respectively.)
3) the TV output can be entirely different than the one on the originating iDevice's actual screen output. This means you can display the current time or even presenter notes locally, which won't be seen by your audience.
Note that, however, you cannot just switch to another program to quickly look up something without the audience seeing it on an A5+ (that is, by default, mirroring-enabled) iDevice or without the TV output getting black (on A4 devices, that is, where there's no OS mirroring). This can only be circumvented on jailbroken iDevices – see next bullet.
4) on jailbroken devices, the app can even be sent in the background with the slideshow continuing – and, with Apple's own “Keynote Remote”, even remaining controllable. This is the subject of Section 1.1 below.
The main disadvantage is as follows: as with many other apps in the AppStore (or in iOS itself, see for example my report on the pretty bad TV out results of the built-in Photos app and Apple's $4.99 iPhoto HERE), the TV out support isn't properly tested / debugged, resulting in major resolution problems with everything Microsoft Office-based. Actually, the achievable resolution, even with the HDMI and VGA adapters, is far-far inferior to that of even the iPhone 5's mirroring mode, let alone iPads and only a little bit better than with the composite / component cables. This is a MAJOR problem, to which an entire chapter (“2. Problems With Microsoft Office Files”) is devoted below.
Another problem is Apple's not making overscan optional in any of their apps. Unfortunately, Keynote isn't an exception. Your only hope is having a way of wiring up your iDevice to the TV with a connection type where overscan is automatically switched off: VGA or, if you're lucky, HDMI-to-DVI. Please consult THIS tutorial for more info.
1.1 Playing Back Presentations In Background
As with all other iOS apps with native TV output, Keynote also stops outputting when sent to the background by pressing the Home button. (This also applies by the Apple TV's natively playing back an embedded video in full screen – see section “4. Full-screen Playback With the Apple TV”) This makes it impossible to, say, quickly look up a note by pausing the presentation without the mirrored operating system screen to be shown to your audience - assuming you use an A5+ device with, by default, enabled mirroring and with the HDMI / VGA adapters or the Apple TV; on previous devices or with the composite / component cables, a black screen will be shown. This isn't necessarily what you'd prefer – you might want to keep your OS screen or other notes to yourself and not to your public.
This in no way can be fixed unless you jailbreak.
On jailbroken devices, you can install tweaks that allow for Keynote's continuing to work when backgrounded. On iPads with iOS versions prior to iOS6, you have even two: the commercial and absolutely excellent Quasar and the free Backgrounder. (The latter is also compatible with non-iPads and even the earliest operating systems. Note that there won't be TV output with OS versions prior to 3.2.) With any iDevice running iOS6, you have only one choice: the (fortunately, pretty inexpensive) Background Manager.
All these three tweaks (I've tested them all) work just fine with Apple's own Keynote Remote ($1; link; Universal) when Keynote is backgrounded on the linked and connected-to iDevice. The following screenshot shows it running on my iPt4G, linked to two iPads and being connected to the first:
1.1.1 iOS 6: Background Manager ($1)
This brand new and absolutely excellent tweak allows for doing the same as the very similar “Backgrounder” did in iOS versions prior to iOS6: when pressing the “Home” button, the app will run as before. With apps with TV out support like Keynote, this means the title will continue outputting its content to the TV. Again, if you use Keynote Remote, you'll be able to control the slideshow even when it's in the background.

(Main Cydia page)
Configuring it is pretty simple:
1, go to Background Manager > Each App in Settings:

(as with all screenshots below, tap / click them for the large-sized original versons)
2, tap Add Item:

3, select Keynote:

4, Keynote appears in the list below Each App, with an “N” suffix (annotated below):

“N” means it Background Manager uses the native backgrounding of Keynote when you press the Home button. This is the default for everything and, with Keynote, absolutely useless in our cases (as it doesn't support background running at all). Therefore, we'll need to force Keynote to "Background" (in pre-iOS6 parlance, “Forced”) mode. Tap Keynote in the above list and select “Background” in the uppermost “Background Mode” list:

(For (ex-)users of the pre-iOS6 Backgrounder, this “Background” mode is the same as “Forced” mode in Backgrounder, “Native” being the same in both tweaks.)
Also see my posts HERE for more info & my posts on the subject. I've posted a LOT of additional info there on every aspects of multitasking - not only on using multimedia apps, but also disabling for example Mail and Safari from being kept in memory. I also recommend THIS and THIS posts.
1.1.2 Prior to iOS 6
1.1.2.1 (iPad only!) Quasar

(the screenshot, in addition to showing I've purchased this tweak, also shows the developer explains everything is run in the background)
No special settings need to be done with Quasar – it'll keep everything running in the background, even if you tap the “Close” icon in the lower left corner of the window:

1.1.2.2 Backgrounder
This free and excellent tool, as has already been mentioned, runs on everything pre-iOS6, not only on iOS5 iPads. As opposed to Quasar, it doesn't support windowing.
Setting it up is done in exactly the same way as with the iOS6+-only Background Manager – basically, the entire menu structure is the same. There is only one major difference between the two tweaks (iOS compability and price aside): it, by default, defaults to “Forced” (in Background Manager's terminology, “Background”) backgrounding, unlike Background Manager. With the latter, the Background Manager > Global menu will show the following by default:

Also note that, unlike with Background Manager, Backgrounder isn't configured from the system-level Settings app but it has its own icon on the SpringBoard.
This is why you'll need to do a bit more to properly configure it.
It's configured for forced background mode, with two exceptions (Mail and Safari). The forced mode is shown in the following screenshot (in the Global main menu):

Basically, if it's only Keynote (and/or a handful of apps) that you want to run in the background while accessing the TV output, you'll want to change this to “Native”:

Also, after this, don't forget to add Keynote with Forced mode: Overrides > Add and select Keynote in the list.
Then, select Keynote from the Overrides main menu (below, I've also annotated the “Add” icon you need to tap in the previous step):

and tap Forced:

1.2 Any Differences Between Source Devices?
I've mentioned Apple's own, stock Photos and $4.99 iPhoto application as ones also suffering from some major, TV out-specific problems (entire article). The biggest problem of those apps isn't present with Keynote, fortunately. That is, as opposed to Photos and iPhoto, you can conduct your presentation from any kind of device – there won't be much quality difference, assuming the connection is at least comparable. (That is, don't expect the composite or the component (RGB) cable to deliver as good image quality as the HDMI or VGA adapters.)
However! There is a major problem I've discovered – that of the PPT (presentation) files created by any kind of Microsoft Outlook. No matter what technology (iDevice and connection type) you use, they'll look plain awful on the external screen. This is, as has already been mentioned above, the single biggest problem with the current iOS version (1.7.2) of Keynote.
The image quality differences, assuming material created in either the Mac or the iOS version of Keynote, are directly related to the iDevice model and the connection type you use. That is,
- as is evident to readers of my previous TV out-related articles, for the best results (where you absolutely must deliver the best image quality at Full HD resolution), you will want to go for the first-generation 30-pin (non-Lightning) HDMI adapter. As has been explained HERE, the second-generation 30-pin HDMI adapter delivers somewhat worse image quality (IQ for short) in every case. So does the 30-pin VGA adapter in some (but not every!) cases. The Lightning adapters (both the HDMI and VGA ones) deliver definitely worse image quality. Even worse is that of the Apple TV, even that of the 3rd generation. Finally, the two standard-definition connection cables (composite and RGB) deliver way-way worse IQ.
- A5+-based devices should be preferred to A4-based iDevices (iPad 1, iPhone 4 and iPod touch 4G). The latter only deliver 720p or XGA maximal resolution over the HDMI and VGA, respectively. This won't be a problem if you only have an XGA or a, God forbid, SVGA (800x600) projector. With Full HD (1920x1080) or UXGA (1600x1200) ones – or even with SXGA (1280x1024) ones! -, the quality difference will be pretty much visible.
- if possible, stay away from both Lightning-based and Apple TV-based solutions. If a wired connection and using an “old” iDevice aren't problems, use them – again, preferably with the first-gen HDMI adapter or, if the projector doesn't have HDMI or DVI(-D) input, a VGA one. Incidentally, speaking of DVI(-D): as I've explained HERE in section “1.2.3.2 Driving the DVI(-D) Input via HDMI (if Present)”, you can directly connect the HDMI output of your iDevices to DVI(-D) inputs on projectors when present. As only a passive converter is needed for this, no IQ degradation will occur, as opposed to active conversion like that of HDMI -> VGA (digital-to-analog).
- don't forget: if you use the Apple TV and wireless image beaming to the TV because you prefer keeping the signal source in your hands, you may want to go for Apple's own, inexpensive ($0.99) Keynote Remote (also see Section 1.1), assuming the resolution of your projector is over SXGA and you have the necessary high-IQ adapter type to connect to it (preferably a 30-pin first-gen HDMI or, in worse case, Lightning ones. The latter will still deliver better IQ than wireless connections to the ATV). Then, you can just leave the iDevice wired to the projector and control your presentation from another iDevice – wirelessly. The best of the two worlds: excellent IQ not otherwise achievable with the ATV and still being wirelessly connected. Of course, you'll need two iDevices for this but even the oldest iDevice models like the iPhone 3GS will work just fine as a remote. (I've tested this too.)
1.3 So, You Want to See Some Examples Proving I'm Right?
(This part is technical. Non-techies may want to skip straight to Section “2. Problems With Microsoft Office Files”.)
I've created a set of examples proving everything I've stated is right. That is,
- A5+-based devices are preferable to A4-based ones,
- HDMI / VGA adapters are preferable to the composite / component cables,
- 30-pin adapters are preferable to the latest Lightning ones,
- the first-generation 30-pin HDMI is preferable to the second-generation HDMI and
- high-quality wired connections are preferable to wireless connections to the Apple TV.
I also show you the relative IQ of different iDevices' (iPad 1, 2, 3, 4, iPhone 4, 4S, 5) output, some with more than one connection type.
The full screengrabs and their crops all show our old friend, the ISO 12233 resolution chart. I've created a natively 16:9 presentation in the desktop (OS X) Keynote and dragged a 8000x4500 pixel version of the reschart (the original PNG file is HERE; alternative link) to it, filling the entire slide. The resulting presentation is HERE. I've imported the file into the client Keynote running on iOS and captured the HDMI output with a 1080p30-capable frame grabber.
Let's see the results in the order of the above bulleted list!
(continues below)
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