A typical index entry such as Erosion 1, 23–includes a space after the entry text, a comma and a space between page numbers, an en dash to show a page range, and nothing after the last number. You can change the en dash to the word to, or change this separator text in any other way. For example, you could change the separator text so that a comma appears after the entry, such as Erosion, 1.
1)Choose View > Reference Pages, and display the reference page that contains the special text flow.
2)Edit the Separators paragraph. (Look for the paragraph containing 1, 23–.) You can change any separator, but you must use the placeholder numbers 1, 2, and 3.
A custom Separators paragraph on the IX reference page
A. En dash B. Em space