how to set launch option for portal 2?

Answer 1

For windowed, right click portal 2 in your steam library and select set launch options under advanced. Type -windowed in the space provided, with no spaces and with the dash

Answer 2

go to Library -> Portal 2 -> Properties -> Set launch options...

and set your prefered launch options there.

Answer 3

you could open portal 2, select options on main menu, select the video tab, change the display mode to whatever you want (e.g. windowed mode)

Answer 4

Go to your library on steam Right click on Portal 2 Click Properties Click "Set launch options..."

Answer 5

Right click portal 2 in your steam library and select properties there should be a button that says Set launch options 

some commands are

-windowed - (I like to use -sw)

-console - starts the game with dev console enabled

-autoconfig - sets setting for the detected hardware on your computer

Comments

Thanks. Autoconfig helped my launch my portal 2...

Answer 6

Right click game icon and you will see launch options.

Answer 7

right click the game on your steam library and click properties. Then go to launch options and type in what you need their.

Answer 8

Library -> Portal 2 -> Properties -> Set launch options

 

But I think that you can also do it with shortcut at desktop :)

Answer 9

You can either configure the options in-game or you can add launch options to a shortcut to Portal 2 by modifying the target. For example, if you want to launch with the console enabled, you can modify the target to say "C:\<path-to-portal2>" -console