Click "Configuration" then click "Library" under Documents options in Personal Configuration section.
Your folders will be list in "Folders" section.
Click "Configuration" then click "Library" under Documents options in Personal Configuration section.
Click "New folder" button in Folders section.
Enter the name of the folder you want to create and click on the "Save" button, in the right panel. The maximum length of the folder name is 255 characters.
Click "Configuration" then click "Library" under Documents options in Personal Configuration section.
Select the desired folder and click "Rename" in the right panel.
Rename the personal library document folder and click the "Save" button.
Click "Configuration" then click "Library" under Documents options in Personal Configuration section.
Select the desired folder and click "Delete" in the right panel.
Click "Delete" in the confirmation dialogue.
You can not create/rename a personal library document folder with the same name as of an existing personal library document folder.