iconcatalog is the window that by default appears on the bottom right of the screen, with tabs for applications, media, alias(wavefront), tools and such. A user new to irix will close it and wonder why it doesn't reappear on next login
Open a shell and type
Leave it running and shutdown or logout and it will remain.
Or find it from the ToolChest...
Toolchest > Find > Icon Catalog
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