Autodesk 64006-051108-9001 - Discreet Cleaner - Mac User Manual page 121

QuickTime 113
Specify alternate criteria in the Alternate tab for each setting you want to assign.
3.
In this example, the connection speed of each alternate is set to equal the connection speed
of the setting. This will cause the viewer's player to download and play the correct alternate.
The alternate connection speed will normally default to the setting speed.
Note:
Use the Shift or key to select more than one setting in the Setting list.