Alternatively If you open up the library part of the sliding door, you should be able to change the patio stone fill to Air Space or whichever one you want.
Save as a new version if you don't want to overwrite the standard library part.
The advantage to doing this is that it will allow the patio stone fill, if called by other library parts in the file to not be messed up.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"