There are two ways to create a new folder using Opus. The first way is the same as in Explorer - right-click on the background of the file display (or on a folder in the tree) and choose New / Folder.
The second way is to use the Create Folder dialog, which as well as letting you make a new folder also offers some additional functionality:
The two numbers displayed in the bottom-left corner of the dialog (as shown above) indicate the length of the name you have entered and the total length of the path once the folder is created. This can be useful to ensure that your path length doesn't grow beyond the normal maximum of 259 characters - although Opus has no problems dealing with longer paths than that, many other programs (including Explorer) will fail.
To create a folder using the Create Folder dialog, click the
New Folder button on the toolbar and enter the name of the
folder to create. You can create a whole tree of sub-folders at once by entering
the folder names separated by slashes. For
example:
This would create a folder
called One in the current location, then a sub-folder in One
called Two, a sub-folder in Two called Three,
and so on, all in the one operation.
If you turn on the Create multiple folders dialog you can
create multiple folders simultaneously in the current location. If this is
turned on the name field changes to a multi-line text box that lets you enter as
many names as you like (one per line):
The folders will all be created
relative to the current folder. You can also create multiple child-folders at
the same sub-folder level using the vertical bar character (|)
to separate the child folder names.
The above example will create two child
folders, 2016 and 2017, and below those create 12 sub-folders
(one for each month of the year).
In Create multiple
folders mode, the Return key moves to a new line in
the text box, but you can still quickly OK the dialog by pushing
Return twice on the last line, or by pushing
Shift+Return on any line. Since double-tapping
Return at the end is only one extra keystroke, even when only
creating a single folder, you may find it convenient to leave the dialog in this
mode all the time.
The drop-down menu attached to the OK button lets you choose what to do with the new folder once it's been created.
You can also hold the appropriate qualifier key when clicking the OK button, rather than dropping down the menu.