How do I add custom launch arguments?

Steam

1. From your Steam library, right-click the game then click properties
   

   

2. Click Set Launch Options...
   

   

3. Add the launch arguments and click ok. Make sure you include the dash prior to each argument. 

Epic

1. In the Epic Games client click Settings in the lower-left
   

   

2. Scroll down until you find a list of all games you currently have installed

3. Select the game

4. Check the box that says Additional Command-Line Arguments 
   

5. Add the required launch arguments in the box

Ubisoft Connect (uplay)

1. From the Ubisoft Connect client select the game then click properties 
   

   

2. Click Add Command Line Argument
   

3. Add the arguments and click Save