Hello chris zang,
Your printscreen is a great idea. Thanks about it !
I see grey points around your selection, that means your elements are locked.
1° - Check if layers are unlock
2° - Check if these elements are not locked - Clic on : Edition/Lock/Unlock
3° - If you are working on a teamworks project, you have to reserve elements before editing them
Christophe - FRANCEArchicad Designer and Teacher
Archicad 15 to 27 FRA FULL
OS 11.6 Big Sur - MacBook Pro 2017 - 16Go RAM
"Quality is never an accident ; it's always the result of an intelligent effort" John Ruskin