Actions > New Folder
In the Actions menu, the New Folder command lets you create a folder at the current position. If you have a file or closed folder selected, the new folder will be created with the same parent folder as the selected item. If you have an opened folder selected, the new folder will be created as a subfolder of the selected one.
If both sides are selected, a new folder will be created on both sides.
You can create an archive file by including an appropriate extension (such as .zip) in the name.
To create a new folder to use as a base folder, type the path for the new folder into the left or right edit controls, and press the Enter key. In the warning dialog that appears, click the Create button.