Media Explorer browsing family of actions
From CockosWiki
Media Explorer Browser options
With these actions the user is able to navigate and/or change views in the Media Explorer Browser window.
Browser: Browse selected folder, or insert selected media file (Cmd ID 1013)
Sections: Media Explorer
Double-clicking/Enter opens selected folder or executes respective action (can be changed in options/default action: Insert media/open project, Start preview or Do nothing).
Browser: Go to parent folder (Cmd ID 1004)
Sections: Media Explorer
Swaps to one folder above in folder structure.
Browser: Refresh (Cmd ID 40018)
Sections: Media Explorer
Updates current directory.
Browser: Select all media files (Cmd ID 40041)
Sections: Media Explorer
Selects all files in folder supported by REAPER.
Browser: Select next file in directory (Cmd ID 40030)
Sections: Media Explorer
Selects next file after the selected in folder.
Browser: Select previous file in directory (Cmd ID 40029)
Sections: Media Explorer
Selects previous file before the selected in folder.
Browser: Toggle display all files/supported media only (Cmd ID 40006)
Sections: Media Explorer
Toggles the view between all files in folder and only ones supported by REAPER.
Toggle embedding Windows Explorer (Cmd ID 40047)
Sections: Media Explorer
Toggles the view of the build in Media Explorer or adopts the look of the Windows Explorer. Note: also affects the right-click menu.