Hi Rounik,
Should I see a change in the assignment shown on the right after I assign the key? If so, it's not showing up... maybe Logic Pro X is slightly different? Also, what is the "Learn New Assignment" key for? I'm a novice at Logic, so bare with me....
-answered my own question - the key I was trying to assign has a global mac function so it is unable to be used for Logic Pro. Other combinations were used for other shortcuts, so I eventually chose SHIFT 0 for forward and SHIFT 9 for rewind by one frame. Those who are used to FCP may just replace the assignments for JKL keys so they can keep with the gold standard for video...
Thanks,
JR