"Swapping" the function of a key

I am working on designing a Keynote Presentation for my boss. He has always been impressed with the features of Keynote, but has never had anybody that is familiar with it to design his presentations.

I spent some time creating a presentation that he absolutely loves. However, when he rehearsed the presentation with his remote, whenever he tried to go back through an animation, he found that it took him to the beginning of the slide, not to the previous animation. He says if I cannot figure out a way to change this, then he will not be able to use the Keynote presentation.

After doing a bit of research, I found that using the "[" key will take you back one step, instead of taking you back to the beginning of the slide.

Now, I have the problem of trying to figure out a way to "swap" the function of a key so that the "left arrow" key will act as the "[" key.

Does anybody know of any way that I might be able to do that? The way I have everything designed in Keynote, it will not be the same if exported to PowerPoint.

Thanks in advance for the help!

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That did it. Thanks!