When the Update processor is first entered, it is in overtype mode. This means any characters typed overwrite the characters on the screen. Insert mode is used to insert new text just in front of the text beginning at the cursor. When text is typed in the insert mode, the entered text is opened and shown on the next line until insert mode is exited or a cursor movement command is typed.
The letter O displays at the top right corner of the screen when in overtype mode; the letter i displays when in insert mode. As text is entered in either mode, the Update processor word wraps the text as necessary.
|CTRL+R||Toggles between overtype and insert modes.|