Select the folder under which you want to create a new subfolder by right-clicking on it to open the context menu. Now click on "Create new subfolder", enter the folder name and, optionally, further properties and then click on "Save changes".
Select the folder under which you want to create a new subfolder by right-clicking on it to open the context menu. Now click on "Create new subfolder", enter the folder name and, optionally, further properties and then click on "Save changes".