How can I tell what control the modulation wheel is assigned to?

Hello,

I understand how to reassign the Mod Wheel and other controls with Command-L. However, once I deleted my learned assignments I realized that the modulation wheel had not been working as it should with the thousands of other presets. Apparently, when I assigned it to the EVP88's Tremolo, it became deactivated from controlling all sorts of fun stuff on the synths.

My questions is in a two parts:

1. If I open up some presets in the ES E (for example), I hear the mod wheel tweaking the sound, but I don't see the control it's manipulating when I'm looking at the instrument window on the screen. How can I find out what control the mod wheel is linked to in each instrument?

2. If I want to reassign the mod wheel on a particular instrument preset, how can I tell logic that this assignment should only be aplicable in a particular preset, and to forget that reassignment when swiching instruments or presets?

Thanks in advance,

I'm proudly 10.6.8 and staying there

Logic 9.1.8

MacBook pro early 2011 refurbished