Asus CRW-5232AS User Manual page 34

2. When the drive tray ejects out of the drive,
place the disc on the tray with the label
(printed) side up.
If you are using a 12-cm disc, place it
on the outer circular border of the tray.
If you are using an 8-cm disc, place it
on the inner circular border.
34 ASUS CRW-5232AS
12-cm Disc
8-cm Disc