Text can be inserted and overwritten in the COBOL editor. The insert/overwrite mode can be toggled by pressing the "Insert" key. The current mode is indicated in the status bar.
For example, if "1234567890" is displayed in the text editor with the cursor to the left of the "1" and you type "abcde":
In Insert mode, the result will be: abcde1234567890
In Overwrite mode, the result will be: abcde67890
