Add new features:
1.Atom object copy. Use Ctrl+D.
2. Bulk operations on Atom objects (delete, other operations may be added in the future).
Select the Atom that you want to operate through BoxSelect or SingleSelect.
Then press Delete.
The choice of adding BoxSelect: LeftCtrl + LMB.
The exclusion choice of BoxSelect: LeftCtrl + Alt + LMB.
SingleSelect add / exclude option: LeftShift + LMB.
UnSelect All : LeftAlt + LMB
There are some restrictions when BoxSelect or SingleSelect: