1)Make the appropriate document window or book window active. If a book window is active, select the documents you want to affect.
2)Choose Format > Document > Change Bars.
3)Specify the thickness of the change bars and the distance from the column of text to the change bars.
4)Choose the position of the change bars from the Position pop-up menu. Choose Side Closer To Page Edge or Side Farther From Page Edge to vary the position of the change bars from side to side based on the page layout.
The position is relative to the edges of the column that contains the changed text, regardless of the number of columns on the page.
5)Choose a color for the change bars from the Color pop-up menu.
6)Select Automatic Change Bars, and click Set.
Automatic Change Bars don’t detect changes in graphics imported by reference unless the name of the imported file has been changed. Automatic change bars also don’t detect changes that affect only formatting. For example, if you only change the tag of a paragraph from Body to Bullet, no change bar appears. In this case, you can add a change bar manually if necessary.
note: If cross-references are updated when Automatic Change Bars is selected, change bars appear next to all changed cross-references.