Undocumented "Features"

For the life of me, I can't find how to disable that little rectangle with arrows on either end that keeps popping up to help me! Can't even figure out what to call it except Satan.

I don't know if it is associated with that critter, but I can move my mouse and find all my text shrinks or expands and I seldom figure out how to stop it.

Sorry if I've posted to the wrong place, as I said I don't even know what that blasted thing is! :demon:

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