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For an American Truck Simulator triple monitor setup, first join the three screens into one wide desktop with NVIDIA Surround or AMD Eyefinity. Then close the game, open Documents\American Truck Simulator\config.cfg and set uset r_multimon_mode "2" for three separate views, or "4" for a custom layout in multimon_config.sii. This is set in your own game; your server is not involved.

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Before you start

  • The game supports only setups it sees as one large virtual screen: NVIDIA Surround, AMD Eyefinity or an equivalent. Set that up in your graphics driver first.
  • Use the same resolution and refresh rate on all three monitors.
  • Close the game before editing config.cfg; it can overwrite the file while running.

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Which r_multimon_mode should I use?

Mode 2 is the simplest for most triple-screen rigs because the side screens get their own angled view. Use 4 when your screens are different sizes, have thick bezels or sit at unusual angles.

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How to set up three monitors

1

Create the wide desktop

In the NVIDIA or AMD control panel, combine the three monitors into one Surround or Eyefinity display. Add bezel correction there if you want.
2

Set the resolution in game

Start the game and choose the full combined resolution (for example 5760×1080 for three 1920×1080 screens). Then close the game.
3

Edit config.cfg

Open Documents\American Truck Simulator\config.cfg and change:
SCS recommends g_interior_camera_zero_pitch "1" so the side views line up.
4

Start and check

Start the game, sit in the cab and check that the side monitors show the side windows. Adjust your seat position in the game if the view is off.

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How to make a custom layout (multimon_config.sii)

1

Switch to mode 4

Set uset r_multimon_mode "4" in config.cfg and start the game once. It creates Documents\American Truck Simulator\multimon_config.sii.
2

Start from the three-screen preset

Turn on the developer console, press ~ and type multimon init three.
3

Adjust and save

Change values with multimon set <name> <attribute> <value>, list monitors with multimon list, then type multimon save. Unsaved changes are lost when you quit or change display options.
Each monitor in the file has a name, a position and size (normalized_x, normalized_y, normalized_width, normalized_height) and view angles (heading_offset, pitch_offset, roll_offset). For three equal screens, normalized_x is 0.0, 0.333333 and 0.666666, with normalized_width 0.333333 each.

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How to fix the field of view (FOV)

Set r_multimon_fov_horizontal or r_multimon_fov_vertical in config.cfg or the console. If only one is set, the game calculates the other from your resolution. If both are 0, the game uses its normal camera FOV.

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Frequently asked questions

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Does triple monitor work without Surround or Eyefinity?

SCS supports only setups shown to the game as one virtual screen. Without Surround, Eyefinity or an equivalent, the game sees separate monitors and can’t spread across them.

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Where is the ATS triple monitor config file?

Documents\American Truck Simulator\multimon_config.sii. The game creates it the first time you start with r_multimon_mode "4".

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Why are my side screens stretched?

You are in mode 0 or 1, which draw one flat view. Use mode 2 or 4 for angled side views.

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Does my server need anything for triple monitors?

No. Monitor setup is only in your game. Players with one screen and three screens can drive in the same convoy.

ATS server guide

Every ATS page in one place.

Developer console

Needed for multimon commands.

Force feedback settings

Wheel settings for your rig.

Convoy server explained

Drive your rig with friends.
Checked against the official SCS multi-monitor configuration guide and multimon command documentation on 30 October 2026. Both games use the same engine; settings may change with game updates.

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Last Updated: October 2026