You can't set keyboard shortcuts in InDesign except within InDesign.
Go to Edit > Keyboard Shortcuts. You need create a New Set from the Set menu (you can't modify the default). Go to Product Area: Object Menu > Arrange > Send Backwards [or the other commands] and enter your keystroke. You might want to add a modifier key like Command + Down Arrow, or you're replacing your ability to nudge objects with the Down Arrow.
Thank you! That worked Great! I don't mind not being able to nudge things since I can move things manually. My side arrows don't nudge sideways either because they are set to move from my desktop screen to widget screens.... That was done in my system preferences.
You say that this is the only way to program those keys but I am certain that I had them programmed to do just that before, outside of the InDesign program because I'm pretty sure the sending backwards / bringing forward function worked in all my art programs and I am positive I didn't program all my art programs to do that. As a matter of fact I am almost certain that however I did program those keys, it wasn't the way you just explained...
But this is perfect. Thank you! I really don't care about the other programs anyway.
Hey I have another question for you since you were so great at answering my last one... How do I get the control bar (the header menu) to be attached to the page? Right now it's detached and I am used to it the other way and prefer it that way. Thanks!
Go to the Control panel menu and choose Dock at Top instead of Floating.