Mac Touch Bar and Hidden Characters

I am reposting this question (Translate key events to nothing?) hoping to resolve an issue that is causing me no end of, bug chasing. Arggh, Help.

On a Mac with a touchbar, if my finger slips and hits any of F2-F12, an invisible character .00 is entered. It would be ok if I could see the character and find the error. But, I can't see it as it is, ummm, invisible. (I've been copying and pasting every input to a vi buffer to look for the .00)

Is there any way to make .00 show up as a visible character? Or better yet, map F2-12 to something other than entering a visible character?

Item[KeyEvent["F3"], SelectionHelpDialog[False]],


etc...

Item[KeyEvent["F12"], SelectionHelpDialog[False]]

• Addendum; Dynamic[ControllerState[]] indicates that the touch bar keys are call Touch Button N, where N \in Range[1,11]. I am not sure if this helps. – Craig Carter May 1 '19 at 0:09
• What do the cell contents (Cell | Show Expression) of an affected cell look like? – Carl Woll May 1 '19 at 2:10
• @CarlWoll Cell[BoxData["\.00"], "Input", CellChangeTimes->{3.7656654818730288*^9}]` – Rohit Namjoshi May 1 '19 at 2:12
• Can't you just replace \.00 with nothing in the Find dialog? – Carl Woll May 1 '19 at 2:13
• Thanks Rohit. Yes, that’s it. The “.\00” doesn’t appear in the front end. (Silly of me nor to do the shift control e to look, palm slap) – Craig Carter May 1 '19 at 2:16