I would like to know if I can copy multiple columns to another tab or class, and how to do it please.

Hello Dinale,
From the gradebook view, tap on Tools (top bar) > Columns > Select them and Copy

Regards,
Bert

I have tried to copy multiple columns for attendance. I used the add attendance column feature and renamed them week 1, week 2 etc. (instead of the date which is automatically given) in order establish a whole block of attendance columns so I can easily back date. The copying worked well, thank you. But they don't get recognised as attendance columns. Is it not possible to do this?