Global Selections can be done by using tools on either the ribbon toolbar’s View Tab or the right-click menus.
Using Ctrl-A in an Active View or from the right click menu (when cursor is in a photograph, 3D Viewer or table), will select all visible objects in the view (photographs, table, and 3D view) that is currently active in the workspace. When chosen it will select all visible objects in the view where the menu was activated.
These select-all capabilities are quite useful when married with appropriate use of the Visibility Settings.