What do you need help with?

So I was trying to make an underground hideout,and I need to remove a huge rectangle shaped room.

What I am asking, is there any command to do like the fill command in singelplayer?
Like: #mine X Y Z(pos1) X Y Z(pos2) And it will mine that rectangle

If there isn't, I would recommend it, it would help a lot to me

Final checklist

• I know how to properly use check boxes
• [x ] I have not used any OwO's or UwU's in this issue.

Use sel.

#sel pos1
#sel pos2
#sel ca