What is the meaning of the category icon containing blue folders? I don't see it shown under Category Icons in IMatch Help.
What do you mean by blue folders? Show us a screen shot, this will make this clear.
Here's the screenshot...
Thanks. This made it clear which icon you mean.
According to the Category Icons section in the Category help topic:
(https://www.photools.com/community/index.php?action=dlattach;topic=5645.0;attach=12705;image)
this is a category with a formula.
To find the corresponding help topic, just click on Working with Categories in the Help table of contents. Then search (<Ctrl>+<F>) the topic for the word icons.