To access the Devolutions Launcher session menu, right click on an open session tab.
Docking
To undock a session in Launcher, right click the tab to open the selection menu and click Undock.
A shortcut menu becomes available to manage the undock window.
Ctrl-Alt-Delete
To use the shortcut Ctrl-Alt-Delete in a session, right click on the session tab to open the selection menu. Select Special Commands - Send Ctrl-Alt-Delete.