There are two ways to rename keywords, depending on what you want to do.
Rename a keyword in the index: If you want to rename a keyword in the index, rename it from the Index Designer.
Rename a keyword used by a specific topic: If you want to rename a topic keyword referenced by a specific topic, rename it by changing the topic properties. If other topics use the same keyword, the original keyword remains in the index. Only the topic you change is updated to use the new keyword name.
Click the Index tab.
From the keyword list, right-click the one to change and select Rename.
Type the new keyword name and press ENTER.
From the Topic List or Project Manager, select the topic.
Click Properties
.
Click the Index tab.
From the list of keywords, select the one to rename.
In the keyword text box, edit the text.
Click Replace.