SE16 – Sample with table of reservations RESB
Past all orders in selection in RSNUM, clear max number of entry

/H

F8
F9 Breakpoint with SET PF-STATUS

F8

Select table excl_tab

CleanUp table
Double click on table in right screen
Choose (hammer+tool)

Choose Delete table

Just Confirm

Table is empty

F8
Select ALL
And you have ALL Functions available in SAP Menu including delete ALL

Choose YES

PDF file with screenshots :  SE16 Activate all controls