There is no such thing as a dumb question ... only dumb answers, ok"
Ol!

Just select the prop you want to save ... open the Props Library and click the plus (+) sign at the bottom of the Library window ... give your prop a name and WALLA !!! It's in the Library.

Want to delete it?

Just click on the Library thumbnail image and then click the minus (-) sign at the bottom of the Library  window ... presto ... prop all gone !!!

cheers,
dr geep
;=]

Remember ... "With Poser, all things are possible, and poseable!"

cheers,

dr geep ... :o]

edited 10/5/2019