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The first method requires that you select individual or multiple resources by checking the boxes located to the left of each resource (you may also check the box next to a group, such as the 'Ungrouped resources' to move the whole group to another group), then click on the MOVE TO button, and then select which group/folder you wish the resources to be moved to. All selected resources will then be moved into the selected group/folder.
The second method requires that you drag individual resources from their current position into their new group/folder. To do this, click and hold the cross located to the right of each individual resource and drag it to the group/folder you would like it to be located in, then release your mouse. This will result in the resource being located in the new group/folder position.
You can edit the name of a group/folder by selecting the BLACK FOLDER icon to the right of the group/folder name. It will not alter your resources, only the folder name.
You can delete a folder by selecting the RED FOLDER icon. It will not delete your resources, only the folder, and your resources will move back into the ungrouped folder.