Set Vertical Ruler Preferences

You can display the vertical ruler in the Program Listing area to see the line numbers for statements in the active program.

Follow these steps:

1. Display a program in the Program Listing area.

2. Select Window, Preferences.
   The Preferences dialog opens.

3. Expand the General, Editors and select Text Editors.
   The Preferences dialog opens Text Editors page.

4. Click the Show Line numbers check box to activate the ruler in the Program Listing area. Click Apply to save the settings and click OK.
   The Program Listing area displays a vertical rule showing the line numbers for all statements in the program.