i AM A NEWBEE...I lost the 3D PRESPECTIVE VIEW. i HAVE ALL OF THE OTHER VIEW. LOOKS LIKE i AM LOOKING UP AT THE SKY. HOW DO I GET IT BACK?

I HAVE SHUT DOWN AND RELOADED THE VIEW . ORGINAL MODEL IS REVIT 2021. HELP

!!! PLEASE

i GOT IT BACK... BY LUCK.

How'd you get it back? I have a similar thing happening on a 2 month old project ​