There was a spotlight feature on the DJI app that kept the camera pointing at the moving object while you could concentrate on flying the drone around the object. It is no longer in the app. Did something replace it? Is there a way to still do that.

How do I change the name and put my picture on this forum page?

Click on the Icon next to the bell at the top right of the page to go to your account,  then click settings on the left side of the page and then you should be able to change your name and upload a pic for your avatar.

Do you have the AC in the AIR when switching to this mode?

Check out this tutorial for instance.

I think the problem is Spotlight, Profile and Trace seem to no longer exist in GO 4.  All I can find is how to use these functions in the previous versions of the GO app.
Now its entirely possible I haven't found it, or its handled through a different function.  GO 4 has various new functions, but I'm particularly interested in figuring out how to do spotlight.  So I have the same question as the OP.

These modes are available when in,active track mode.  When you select active track they appear in,a sub menu that appears on the right of the flight screen.

Thank you for that help. I didn't know you had to select go , after selecting active track to get the spotlight feature. Thanks a lot. No one a DJI knows that either.