Ben,
Sorry, missed the fact that you use an Apple.
Again I say, go to the project map and right-click (on a Mac, which key activates contextual menus - the Apple key?) on the detail you want to delete. Pick the delete option from the menu and when quizzed as to whether or not you are sure you want to delete, click "proceed" to delete the detail.
Think Like a Spec Writer
AC4.55 through 27 / USA AC27-6000 USA
Rhino 8 Mac
MacOS 14.6.1