Optional Icons Sizes

There is no 48 requirement for the document or application group icons because neither are expected to be used for a minimized window icon (the tool's icon is used instead) or on the Front Panel. But it is possible that a user might promote one of these icons to the Front Panel.

When a size 48 icon is not available, the Front Panel uses the size 32 icon instead. If you think your icons might be used in the Front Panel, you can supply size 48 icons.