No, underscore indicates overstrike. Presumably you mean the caret (the cursor is the thing the mouse moves around).
In insert mode the caret can be a vertical line or a block and in overstrike mode it can be an underscore or a block. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/geany/geany/issues/2478#issuecomment-615838810