I found out that I can save the search (FIND) and then use it in my favourites. As an example, I have given the search result the name "gems (cache):
Is the FileCollection stored there static or dynamic? By dynamic I mean that every time I call this up under my favourites, the search is carried out again.
This is static in my case, but I would like to have dynamic behaviour.
You can create dynamic file collections...
be cautious with how you set them up... I set one up up for a movie collection on a 6 tb hdd. That was set to refresh every time I boot\started dopus. Forgot how I set up as it up as I was play. It took me a couple weeks to figure out while dopus was spinning my media drive for a couple mins every I reboot. 
Thanks for the quick help. I now understand that "File Collection" is a kind of "snapshoot", and "Stored Query" is what I want. DOPUS is getting cooler and cooler. 
It is very cool, fun, and powerful!!
Keep coming back to the forum and you'll learn all kinds of tricks it can. The buttons treads in particular .
I've been using it 4 years, I'm still a total newbie.
