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DisplaySwitch.exe

Display Switch
DisplaySwitch.exe can be used on the command line (cmd.exe, PowerShell) to open the presentation (or projection) sidebar.
The presentation sidebar can also be opened with the windows+p keyboard shortcut.
The presentation sidebar allows to choose from four options:

Command line options

The chooseable options can also used with command line options:
displayswitch /internal Use one monitor, the internal one, only.
displayswitch /clone Show the same content on both (all?) monitors.
displayswitch /extend Make content larger, allow mouse to move from one monitor to the other.
displayswitch /external
Apparently, these options are related to multiple displays found in desk.cpl.

See also

Primary and secondary monitors, etc.

Index