Due to different themes, you could encounter a Sticky Table of Content overlapping with your header menu or footer. However, BetterDocs gives you the flexibility to increase the z-index of Sticky TOC so that it doesn’t overlap any section of your WordPress Knowledge Base website.
To increase z-index of Sticky TOC, go to your WordPress Dashboard -> BetterDocs -> Design -> Customize.
Afterward, go to the ‘Single Doc’ page. From ‘Table of Content’ section, you will find options to increase z-index of Sticky Table of Content. Simply just use the ‘Sticky TOC z-index’ option to increase the value and you will be good to go.
This is how you can avoid Sticky Table of Content from overlapping with other sections of your WordPress website in BetterDocs.