Actions on objects in a Folder, Meeting or Discussion are the file management operations familiar from your local operating system. BSCW distinguishes between:
BSCW lets you choose to have the buttons for most actions offered either on the two button bars for selected objects or on the individual object's [Action] bar -- or even in both places concurrently. Quite a few actions may also their buttons on the top button bars of their Info pages.
Choosing one position over the others is mostly a matter of convenience. Section 4.3, section 6.1 and section 6.2 provide detailed information on how you may configure the button bars in the different pages and for the different classes of objects to suit your needs.