When multiple AppStacks that share common components are assigned, you can reorder AppStacks to prioritize a specific AppStack and the applications contained in it.
You can re-order AppStacks provisioned with VMware App Volumes 2.5 or later.
As an example, with VMware App Volumes, you can have both Adobe 9 and Adobe 10.x AppStack attached, although they cannot co-exist natively. When users double-click a PDF file on the desktop, only one Adobe Reader is launched. If Adobe 9 is placed on top of Adobe 10.x in the Assigned AppStacks list, Adobe 9 gets the priority as the default PDF reader application. If the you want to modify the default application, you can use the reordering feature to adjust the stack order so that Adobe 10.x can be default PDF reader to use.
Use the Override Precedence check box on directory or users, or directory or computers tab, then the arrow icons display on the left side of AppStacks, to show that the AppStack can be reordered.
You can drag and drop the AppStack to change the order of each AppStack. If the AppStack is unavailable, this AppStack cannot be reordered.