Buttons to add or remove objects from a group

I want to add/remove objects from groups without:

• Deleting the group and making a new group that includes the new object → I'd have to rename the new group every time to the desired name

• Cutting and pasting the object out of the group/into the group → I'd have to position it back where it was, and with low PC specs (low framerate) zooming in and out while dragging can take a while

…I just want to have an easy and intuitive way to add, and remove objects from groups. You don't delete and make a new download folder every time you download a new file.