With the Set Auto Elevation command, you can easily place your library object on one of the objects located at the point where you want to place it.
Location of Set Auto Elevation Command
You can access it from the Library toolbar that opens when the library command is clicked .
Click on the library command.
Activate Set Auto Elevation command from the toolbar.
Click on the point where you want to place your library.
Select the elevation (object) you want to place from the object selection dialog.
Click the OK button to close the dialog.
Place your library by clicking the left mouse button.
Your library will be placed in the elevation you selected.
Where to create a library
Determining the point where the object will be placed and fixing it by clicking the left mouse button
Selecting the elevation (object) where the library will be placed
Creation of the library