how can I make dopus auto display my directories sizes, without being have to hover the cursor over it first
yes it's one solution
another is to launch TreeSize from D.O. (with good parameter)
If you don't want automatic but want to be able to tell Opus to calculate all the folder sizes at once, on-demand, when you do want them, then you can click the GetSizes button.
By default it is the middle-click action of the Create Folder button but I use it often enough that I've moved it into its own button on the left-click.
If no folders are selected it will calculate the size of all folders. If some are selected then it just calculates the size of them. Quite handy, if you don't want the calculation to be done automatically.
how did u do that ?
See the tutorials forum.
Hi, instead of creating another thread, I'll post in this. 
Whenever I stop my mouse over a folder, it starts to calculate the size of the folder. Is there a way to turn that off?
Remove {foldersize} from the InfoTip for the All Folders filetype.
(The Filetypes editor can be accessed from Settings/Filetypes...)
Thanks alot!