A reader, June      30, 2020 - 4:44 am UTC
 
 
Thank you very much for the information. 
July      01, 2020 - 1:58 am UTC 
 
glad we could help 
 
 
Martin ROSE, July      20, 2020 - 8:57 am UTC
 
 
This may not be spot on, as I obviously cannot run your code to try it out (and I am also stuck on a very early version of Apex where it does work), but first you need to give the region in question a static ID (this is done in the region definition).
Then,  in Page Rendering --> CSS.
#<static-ID> .uReportDownloadLinks  {position:sticky; bottom:-8px; background-color:#cccccc; padding-top:8px; padding-bottom:8px; z-index:999};You may have to replace .uReportDownloadLinks with what is appropriate for your template.     Use Chrome's inspect ability to help you.
If you don't know CSS, suggest you get learning it.    Google "css position sticky" for more info.
But it's the 
position:sticky;  bottom:-8px
 bit that's the really important part.