(Solved) Typing issue

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i hit must have hit on keyboard , instead of displaying | looking symbol shows next button type go, looks _ , deletes deletes whatever right automatically when press button.

what function called? , how fix this? i've looked @ menu options on arduino program , can't seem find seems similar.

look key near delete key says ins or insert.  have in overwrite mode.  hit key again , go insert mode.


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