how to cancel overwrite

in updating a document, when I use the spacebar it is deleting the next character or overwriting it with typing. how do I cancel this and just type as usual

I closed the document without saving and it is now all right. I still do not understand what happened or how to cancel the overwrite function.

@BarbaraN : You say you still do not understand how to cancel the overwrite function. Did you find the Insert (Ins) key on your keyboard?? Press it once. That cancels the over-write function.

That worked! I pressed the Insert button once and it solved the problem, was really having a panic attack before this…

Press the Insert key to toggle insert or overwrite mode. You get the same result by clicking in the status bar area to the right of the Language area.

That worked! I pressed the Insert button once and it solved the problem, was really having a panic attack before this…

TIL you are able to click on the status bar ‘Overwrite’ label to enable or disable this, the very small details i miss !