Topaz Glow allows users to quickly add glow effects to their images by choosing from a library of 120, which can be used as is or extensively modified and saved. One of the most significant additions in version 2 is built-in masking, thereby eliminating the necessity to use Photoshop's masking capabilities. This makes it possible to add effects via spot, color, luminosity and brush by changing such parameters as custom brush sizes, opacity and hue levels. Also noteworthy is the provision of 22 new blend modes (for a total of 28) and a precision opacity slider. There's also unlimited undo and redo; support for very large images (up to 20,000px wide); 50 new effects; and support for the Topaz Community, which allows users to share custom effects.