Exclude units from a work scope with Bulk Disable
Tick unit cards under 'Show Units' and press 'Bulk Disable (n)' so the scope made with 'Create and continue' leaves those units out.
In '+ Create Work Scope', 'Show Units' lists the design's units as cards.
Ticking cards and pressing 'Bulk Disable (n)' moves the design's units to 'Removed Units'.
The scope made with 'Create and continue' leaves out the units moved to 'Removed Units'.
The rest stay under 'Enabled Units'.