Is there any way to 'hoist' a folder on a temporary basis so that it becomes the top level in the folder tree panel? It would handy when working on a web site locally before ftp-ing it, so as to eliminate all other drive and folder clutter.
Hold shift and right-click it, you should get a Root Tree Here option.
Now that is awesome! Leo, is there a command and/or shortcut for this so it would go into a button?
Yes, Set TREEROOT
Many thanks! Will put that into a button in my layout!
Oh one last question, regarding the folder tree:
Is there also a command for that lock for folder tree folder change? I could only find state unlock, but not the contrary.
What was the unlock thing you found?
Set STATE=LockOff and I figured it could possibly have to do with the lock since I wanted to load an folder tree that has that lock on by default.
Oh, that does something unrelated (details in here).
I don't think there is a way to control the tree lock via commands. How come you need to toggle it on/off via a command rather than by clicking the icon above the tree?
Oh clicking is the same, I just thought I could launch explorer tree each time with it on, cause that is what I always do first when using the tree.
If you want the Tree-Lock on all the time, turn it on and then use Settings -> Set As Default Lister to save that as the new default.
If you don't want the Tree itself to be on by default, you can then close the tree and use Settings -> Set As Default Lister again. Next time you open the tree it will still be locked. (But don't skip the first step of setting the default while the tree is still on and locked, since the default lock state is only modified if the tree is actually visible.)
Gorgeous it works!!! You made my day 
((I really wonder what else you can do with DOpus that is not in the obvious lol....))
Thanks Leo! I thought this would be something no-one else would be interested in. Seems I was wrong.
Be warned, you have foiled me this time but I will find a query you cannot answer 
Fear the Leo, least a man be hoist with his own petard!
Neat! I'm gonna use this!
set TREEROOT alone doesn't appear to do anything on a button. I had expected it to do the same as shift/ rightclick/ Root Tree Here but if i highlight a folder and click the button, I get no action at all.
What am I missing?
I can get it to work fine by specifying a location, of course
What are you trying to do?
If you want to root the tree in the current folder:
Set TREEROOT {sourcepath}
If you want a context-menu item to right-click a folder and root the tree there (without having to do it in the folder tree or hold shift):
Set TREEROOT {filepath}
Thanks!