Getting the picture to a projector or a screen

Second displays, extend rather than mirror, resolution and shape, cable runs, and what to do when the house projector is the only screen you get.

Nobody documents this part, and it is where most first nights go wrong. The visuals are fine. The picture does not arrive.

Extend, never mirror

Mirroring puts your desktop on the wall, including the moment you go looking for a file. Extending gives the projector its own screen, which is where the full screen scene goes while you keep a normal desktop in front of you. It is the first setting to change and the easiest to forget.

Match the shape of the screen you were given

A house projector is usually 16:9, and an LED wall is usually not: strips and panels come in shapes no laptop offers as a preset. Build the scene in the shape the surface actually is, rather than making a widescreen picture and hoping the venue stretches it kindly. They rarely do.

Cables and the run to the booth

  • Find out what the venue's input actually is before the night. HDMI is common, older venues still hand you VGA, and an adapter you do not have is a lost show
  • Long HDMI runs fail quietly. Past about 15 metres use a repeater, an optical cable or a converter to network cable, whatever the house has
  • Carry your own adapter for your own laptop. The venue's box of adapters is somebody else's problem by 11pm
  • If a signal has to feed two screens, that is a splitter's job, and a splitter is a piece of hardware rather than a setting

Brightness beats resolution

A projector in a lit bar loses far more to ambient light than to pixel count. Bright shapes on black read across a room; dark and subtle scenes disappear entirely. Look at the wall from the back of the room before you commit to a scene, because what a laptop screen promises at arm's length is not what the wall delivers.

Common questions

Why is my second screen black when I go full screen?

Usually the displays are mirrored rather than extended, or the window is full screen on the laptop's own display. Extend first, drag the window across, then go full screen.

What resolution should I output?

Whatever the projector natively is, usually 1920 by 1080. Feeding it more does not add detail and costs you frames.

Can I run visuals and the music from the same laptop?

Yes, with headroom. Two machines is safer in a club, because nothing you do to the visuals can then touch the music.

The venue only has a TV. Does that work?

Perfectly. A TV is a second display with a better picture than most projectors and none of the ambient light problem.

Last updated 2026-09-15

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