File Settings in the Files and Folders Page - VSIX Project
Adding files
 Use the  toolbar button, the “Add Files...”
        tree/list context menu item or press the + key
        while the files panel is focused.
 Use the  toolbar button, the “Add Files...”
        tree/list context menu item or press the + key
        while the files panel is focused.
Setting file properties
 Use the
           toolbar button, the
          “Properties...” list context menu item, press the
          Enter key while a file in the
          “Files” panel is selected or double click on a file.
 Use the
           toolbar button, the
          “Properties...” list context menu item, press the
          Enter key while a file in the
          “Files” panel is selected or double click on a file.
 Depending on the project type, the VSIX File Properties or MSIX/AppX File Properties
        dialog will be shown, helping you to configure the file. 
Opening files
Use the “Open” context menu item or press the F9 key while a file is selected.
Moving files to a different folder
Select the items to be moved then drag and drop them to the target folder. If you press the SHIFT key while moving the files you will create a duplicate copy of the files.
Removing files
 Use the 
        toolbar button, the “Delete” tree/list context menu item, or
        press the Delete key while a file is
        selected.
 Use the 
        toolbar button, the “Delete” tree/list context menu item, or
        press the Delete key while a file is
        selected.
Topics
- VSIX File Properties
 Edit file properties in VSIX projects.
- MSIX/AppX File Properties
 Edit file properties in MSIX/AppX packages