In PM6+ Organizer, with Reuse Search Tabs unclicked and one Contact Sheet open and two or three Search + Tabs open, right clicking on one of the search Tabs offers several commands, one of which is "Close ALL BUT this tab Ctrl+Shift+W. But in the Contact Sheet Tab there is no such offering, you have to close each Search Tab individually or else use the Ctrl+Shift+W keyboard command.
IMHO it would be a big time saver to offer the "Close All But this tab" in the Contact Sheet window as well.
Thanks.
Warren
Win 10, i7-8086K, 16GB RAM, PM6+ Build 3328