overtype or insert mode for typing
Hello, I love Thunderbird, but my new Macbook Air keyboard does not have an insert key (for overwriting). Is there any facility within Thunderbird for Mac for me to toggle this mode? (For instance, Word for Mac has the overwrite toggle in its bottom menu bar)? For deleting characters forward, I must use fn + backspace, but an insert or overwrite mode would so useful for general editing. Regardless, many thanks, Nick