With my 7610 in sim mode, it wont let me choose a transducer or change to a different one. In fact it wont even tell me which one it is simulating!

It does let me change frequencies on 2D between 50, 95 and 200 - but not on downview or sidwview. They are both stuck on 455.

The only transducer I have plugged in right now is my PS21 connected to the 7610 in my study.

If I go into simulator mode and change the depth range, it carries over when I turn the sim OFF. I would suspect other changes would as well, but I didnt try anything else.

How that would work on a different mfd I dont know. They may not all preform the same way.

So, some things you can mess with and others you cant.

For sure, at least some settings you change while in simulator mode WILL stick, so I would be sure to restore to Factory defaults before you go out on the water for the first time or you may have some odd things going on :)