FreeCommander

The position of the "Quick viewer panel" in the main window is shown in chapter "Overview of the user interface".

Activating the menu item "View → Quick view panel" or the shortcut "Ctrl+Q" activates/deactivates the "Quick view panel".

The item, highlighted in the active panel, is shown in the "Quick viewer panel" separately. The "Quick viewer panel" stays open (also when an other item is highlighted and therefore shown in quick viewer) as long as it is closed by activating the menu item "View → Quick view panel" or the shortcut "Ctrl+Q".

Where and how items are shown (according to their file type) in the "Quick viewer panel" can be defined under the menu item "Tools → Settings → View → Viewer".