To delete a folder you must first have it selected (highlighted in blue), by clicking on either its folder name or its folder icon.
Fig 1.0 Select (left click on) a folder and then press the COMAND and BACKSPACE keyboard keys down together
Once the folder is selected (highlighted in blue) you then have four main methods for deleting it. With the first method press the COMMAND keyboard down, and with it still held down, press the BACKSPACE keyboard key. Doing so will delete the selected folder (i.e. Cooking) and then select the next available folder (i.e. Microsoft User Center).
Fig 1.1 The selected folder (Cooking) has been deleted - Microsoft User Center folder now automatically selected
With the second method you don't need to select (left click on) the folder. When you click over it using the right mouse button (right click), whilst the mouse pointer is over the folder, a context (options) menu will appear whereby the folder is then selected for you automatically.
Fig 1.2 Right Click over a folder whilst the mouse pointer is over that folder to bring up its context (options) menu
When the context menu appears (above) move the mouse pointer down its menu items until it reaches and highlights in blue the menu-item called MOVE TO TRASH. From there keep the mouse pointer still, whilst it is over the highlighted menu-item called MOVE TO TRASH, and click the left mouse button. So you have clicked on the highlighted menu-item called MOVE TO TRASH in other words. This will then delete (move into the Trashcan) the selected folder (i.e. Cooking).
Fig 1.3 Left Click on the MOVE TO TRASH menu-item to delete the selected folder
The third method requires the folder you want deleting to be selected (as in Fig 1.0 above) so that it is the active window (active folder) and can therefore utilise the Apple Menu Bar menus (titles) and menu-items (menu options) at the top of the desktop screen. In other words, you are making sure the Apple Menu Bar menus (titles) and menu-items (menu options) correspond to the options available for the selected folder (Cooking in this example).
Once the folder you want to delete (Cooking) is selected, and therefore the active window (active folder), you can then click on the FILE menu (the title called: FILE) on the Apple Memu Bar.
Fig 1.4 Click on the FILE Menu to reveal the FILE Menu-Items (Options)
Clicking on the FILE menu will reveal the FILE Menu-Items (Options) available for the active folder (active window) - Cooking in this example. You now need to move the mouse pointer downwards (down the menu-items) until it reaches and highlights in blue the menu-item called MOVE TO TRASH. From there you keep the mouse pointer still, whilst it is over the highlighted menu-item called MOVE TO TRASH, and click the left mouse button. So you have clicked on the highlighted menu-item called MOVE TO TRASH in other words. This will then delete (move into the Trashcan) the selected folder (Cooking).
Fig 1.5 Click on the MOVE TO TRASH menu-item to delete the selected folder
The fourth method uses the DRAG & DROP techniques. This basically means you get hold of the folder you want to delete, using the left mouse button, and physically move it (drag it) into the Trashcan using the mouse pointer. To see what I mean; Click on the folder you want to delete but do NOT let go of the click - Keep the left mouse button pressed down. Now move the mouse pointer towards the Trashcan, with the left mouse button still clicked whilst on top of the selected folder, so that you are now dragging (moving) the selected folder along with the mouse pointer.
Fig 1.6 Move the selected folder towards the Trashcan by dragging it with the mouse pointer
When the mouse pointer and folder have reached the Trashcan, so they are more or less hovering over the Trashcan, let go of the left mouse button in order to DROP the selected folder into the Trashcan. This whole technique is known as DRAG & DROP, because you are dragging (moving) a folder and dropping it into something. In this example, into the Trashcan (which is technically a folder too). The DRAG & DROP technique is also used with files and e-mails.
Fig 1.7 When the selected folder is over the Trashcan, release the left mouse button.
Fig 1.8 The selected folder is now inside the Trashcan
The eagle eyed amongst you will have spotted the DELETE and ACTION buttons on the DOCUMENTS folder (window), but I purposely did not mention these as methods for deleting a selected folder simply because they cannot be alternative methods if those button are hidden (switched off via folder customisation). So don't rely on them being available on any folder's window in other words. If they are available though just click on them and then follow the above procedure to delete the selected folder. The ACTION button was explained in the Create A New Folder section.
Fig 1.9 Select a folder and then click on the DELETE button to move it into the Trashcan
Fig 1.10 Select a folder, click on the ACTION button and then click on the MOVE TO TRASH menu-item.
If you ever need to Undelete something from the Trashcan click on the Trashcan to open its folder, right click on the folder you want to undelete and then click on the PUT BACK menu-item. This will put the selected folder back in its original place (i.e. inside the DOCUMENTS folder again).
Fig 1.11 Open the Trashcan, right click on a folder and then click on the PUT BACK menu-item
On the other hand; If you want to permanently delete the selected folder, and everything else that is inside the Trashcan, first right click on the Trashcan icon to bring up its context (options) menu and then left click on its EMPTY TRASH menu-item.
Fig 1.12 Right Click on the Trashcan icon and then left click on the EMPTY TRASH menu-item
If you don't have a mouse with a right click on it, for whatever reason(s), you can always emulate the right mouse click - Press the CTRL (CONTROL) keyboard key down and with it held down then click the left mouse button. This will then bring up the context (options) menu for that application, folder or whatever.