Can't alternate selection using tab key

[Anonymous]

I am using Revit 2020 Student Version,

I can't alternate selection using tab key.

Please advise me, it seems this option is very important!

[barthbradley]

Try disabling hardware acceleration.

I suspect Graphics Card. Update driver.  

….you say "it seems this option is very important'". Have you TAB-Selected before?  Are you sure you are doing it properly? That you have overlapping elements to cycle through? 

...BTW, there are Selection Restrictors that can impact.  Under "Modify" click arrow to expand dialog box and see if there are any boxes unchecked?  

[Anonymous]

Use the tab key at the left of your keyboard not the long tab key at the down.

Sahar

[engineers_struxos]

Activate select pinned elements on the select drop down menu