Yeah, that's why I posted it. I mean I figured it was common sense obvious stuff, but maybe not.
Not all keyboards have an insert key.
The damning argument against enabling overtype mode via the insert key is the key located below it. The forward delete key. Nuff said.
BTW overtype mode is already supported. By pressing the INS key. In mIRC.
I think I've proven that this thread is MUD.
You are asking for a notification icon. Not support for enabling it via the INS key.
Okay my mistake.