You place the objects to the Story Levels.
Door Headers at 7'-0" from Story 02
Window Sill at 2'-6" of Story X
Light Switches at 5'-0" from story 03 or at 50'-3" above Story-Light Switch
and so it goes.
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If you want you can create reference stories and then do everything to 0'-0" to that story but that is kind of more work than necessary
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator