Show only loaded members: By default, the members palette will display all of the members that the current format supports. Enabling this option limits it to the members contained in an icon that is opened.
Check masks when saving: If masks are created incorrectly, it is possible for the icon to not display as desired when you view it in the Finder. This setting enables Iconographer to check the masks and optionally, if errors are found, to fix them.
Dither when copying down to lower depths: This option dithers images when they are copied down to lower bit depths (for example, for 32-bits to 8-bits). Dithering is the use of a pattern to simulate colors.
Startup Options: This set of radio buttons allows you to determine what action Iconographer will perform on start-up. By default it creates a new, empty, icon, but it can also be made to automatically select an icon to open, or simply stay open and do nothing.
Members Palette Display: The members palette usually displays it's contents at their natural size. However, if an icon contains many of them, and the screen area is limited, it becomes rather tedious to scroll between members. This option allows you to scale them down so that they take up less space (this is purely an aesthetic modification, the actual contents of the icon are not modified in any way).