How to create simple shortcut?

I want to assign a keystroke combination to another combination. I use two iMacs together and sometimes share the screens through an ethernet connection using target display mode, other times I use the macs separately. The key combination to turn the screen sharing on and off is Command - F2. But the keyboard I use uses those keys for other functions. I've been keeping a second keyboard around, but thought maybe if I could assign Command -F2 to another key sequence I wouldn't need the second keyboard.

Is there a good way to do this? I started looking into Automator, and then there's the Keyboard Shortcuts section in Systems Prefs. But haven't been able to find what looks like the right way to do this.

Is there a simple way to assign a keystroke combination to another combination?

Thanks!

 

Thanks. I had tried that before, but couldn't get it to work. The only option that has the +/- sign is App Shortcust. I went into that, chose Finder for the app - then a screen comes up that asks you to put in the Menu Title and then 'Enter the exact name of the menu command you want to edit'. But I can't type anything into that box, neither key commands or any test seems to be able to go in there.??