1.   On the Icon bar, click Index.

2.   Verify that the Index Collections button on the Index toolbar is set to Keywords, and ensure that keywords (not groups) are displayed in the upper left pane.

3.   In the upper left pane, right-click the desired keyword, then click Rename.

4.   Type the new keyword name, then press Enter. Doc-To-Help moves the keyword to preserve alphabetical order, if necessary.

Alternatively you can select the keyword and then click it a second time so that the cursor blinks at the end of it, type the new keyword name, and press Enter.