Big Mask. The mask determines what pixels are actually drawn. The black pixels in the mask will be filled in with the corresponding pixels from the icon. The white pixels in the mask will not be; whatever is under those pixels will show through. Small Mask. The mask determines what pixels are actually drawn. The black pixels in the mask will be filled in with the corresponding pixels from the icon. The white pixels in the mask will not be; whatever is under those pixels will show through. ics4. Small Icon Family, 16 Colors icl4. Large Icon Family, 16 Colors. ics8. Small Icon Family, 256 Colors. icl8. Large Icon Family, 256 Colors. ICN#. Large Icon Family, Black and White ics#. Small Icon Family, Black and White. Editor. This is the small editor. You can edit all resources here. For icons, however, give the large editor a try (available from the Windows menu). It gives you variable magnification levels and a lot more room to work in.