How can I improve ability to search glossary?

RH 9, WebHelp output. I have a pre-existing project with a pretty extensive glossary, and users have asked if it's possible to add a search field. That does not seem possible (although I can think of some creative solutions to help). However, when I went through an old test project and ran the output (same version and WH output), I saw a handy alphabetical link that could help my users. But I can't get this handy field to appear in my existing project's output. Any advice? I am using a custom skin.

I tried hotspotting a few terms in the project but the handy set of links, tab, whatever you want to call it, will not display.

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