This is one of the stranger ways of working in archicad.
To get them to show in s/e windows:
1. open the section or elevation window
2.Select all windows and check the 'Label elements' box.
3.Select all these labels (activate label tool and ctrl/cmd+A)
4. change type of label to window label of choice.
5. check the 'use symbol arrow'
6. set size,font, shape of marker etc.
7. use ID
same for doors but use door label
HTH
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"