At some point my cursor changed from a vertical bar to an underbar. I must have pressed some magic combination of keys. Any idea how to change it back?
in my case it changed on pressing key fn+insert
in SublimeText 3 and windows 10
On MacOS, where there's no insert key, fn+I may be the best approach (it imitates insert).
Stuff like this happens a lot in Sublime to me. To answer your question <Insert>
changes it back. Often I'll hit some keys and end up in full screen mode which is never fun.
For Windows: Fn + Insert. In some keyboards separate insert is not given.They can use Fn + prt sc
'Shift+Ins' in the Numpad worked for me in Genie text editor. It was quite disturbing to see the code overwritten instead of inserting.
Hit Insert That'll change it back. You might have noticed that if you went back on code and typed some you'd be overwriting instead of inserting.