Simple Instructions:
The "Show Files" pull-down menu underneath each tree shows a list of predefined
filters, such as "Images". Choosing this temporarily hides all other files in
the tree. To restore the tree, change the filter back to "All Files". These
operations do not alter the collection, nor do they affect the folders in the
tree.
Advanced Instructions:
You can specify a custom filter by typing in a pattern to match files against.
Use standard file system abbreviations such as "*.*" or "*.doc" ("*" matches
any characters).