As rule of thumb, icons alone should only be permitted when at least two out of the following three conditions apply:
- Space is very limited (i.e., too small for text alone).
- The icons are standardized (e.g., the floppy disk image for save)
- The icon represents an object with a strong physical analog or a
visual attribute (e.g., a printer icon to access printer attributes, or a
red rectangle to set a page background red).