If you choose this category in the Options dialog box , then you get the following dialog box:

You can edit the default color setting of CODESYS. You can choose whether you want to change the color settings for Line numbers (default presetting: light gray), for Breakpoint positions (dark gray), for a Set breakpoint (light blue), for the Current position (red), for the Reached Positions (green) or for the Monitoring of Boolean values (blue).

If you have chosen one of the indicated buttons, the dialog box for the input of colors opens.