There are a number of controls and breadcrumbs that determine the display of the Resources tool, making it easier to maneuver about within the tool.
Go to Resources.
Select the Resources tool from the Tool Menu of your site.
Clicking on the name of any folder will isolate the display to just the contents of that folder.
Folders containing content will display as a closed folder icon with a white plus sign. Selecting a closed folder will open it and display a minus sign. Selecting an open folder will close the folder again.
Expand All/Collapse All
Selecting Expand All will open up and display the contents of all folders and subfolders. Selecting Collapse All will close all folders and subfolders.
Expand All/Collapse All is a toggle button. Selecting it once will expand the display; selectingit again will collapse the display.
Selecting All Site Files link will display a search field. Enter keywords to locate a specific file or files.