I have a 2560x1440p monitor and i have steam i have tried command lines i have tried the windowed ingame. I use 3 monitors when i play so it annoying to have  my mouse locked to one screen. from what others have posted over at steam it seems random wether  it works or not.

Any help here whould be appriciated..

Heya clstreak1,

 

In order to get borderless windowed mode to work, you should only have to set it to "windowed" mode at your monitor's resolution. This should automatically change it to borderless windowed mode.

 

For the mouse being locked to one screen, try unchecking the "caged cursor" box in the options menu.

 

Let me know if that does the trick! =)

That took care of it thanks!!

That does not work on my end however, the game seems to think my monitor is 4k, it gave me 3200*1800 default resolution (in that resolution it wont display borders) but my monitor is actually 2560*1440 (Dell 27inch), and this is set correctly in Windows. Thats forcing me to either deal with borders or playing in full screen mode which I dislike, I use my other screen often. Any ideas?

I'm getting borders on windowed mode even tho I only have one screen (1920x1080)

 

https://i.imgur.com/XuyfXyE.jpg

If the game is showing resolutions greater then your monitors and you have a nvidia card, it's possible you have nvidia's DSR (Dynamic Super Resolution) enabled.  Go to the Nvidia control panel and Manage 3d Settings.  Find the DSR - Factors option and uncheck everything so it changes to Off, then apply.

 

Then when you do windowed mode at your monitors resolution, it should be in full-screen windowed

> If the game is showing resolutions greater then your monitors and you have a nvidia card

AMD card here, so I don't think thats why its showing resolutions I cant run. For now I'm playing with a border, you can high it pretty well except one milimeter at the top but still.

have the same problem and seeing a border 

That does not work on my end however, the game seems to think my monitor is 4k, it gave me 3200*1800 default resolution (in that resolution it wont display borders) but my monitor is actually 2560*1440 (Dell 27inch), and this is set correctly in Windows. Thats forcing me to either deal with borders or playing in full screen mode which I dislike, I use my other screen often. Any ideas?

 

I beleive this is because you have DSR (x2.0) enabled in the NVIDA 3d settings, if you turn this off, it will revert to the normal res detection and the fullscreen borderless should kick in with just the native res selected and windowed mode.

 

That does not work on my end however, the game seems to think my monitor is 4k, it gave me 3200*1800 default resolution (in that resolution it wont display borders) but my monitor is actually 2560*1440 (Dell 27inch), and this is set correctly in Windows. Thats forcing me to either deal with borders or playing in full screen mode which I dislike, I use my other screen often. Any ideas?

 

I beleive this is because you have DSR (x2.0) enabled in the NVIDA 3d settings, if you turn this off, it will revert to the normal res detection and the fullscreen borderless should kick in with just the native res selected and windowed mode.

 

I already mentioned Im using AMD though, specificially a r9 290. Unless you are aware of a similar AMD bug it doesn't apply to my situation.

 

Its not the end of the world, but it seems to be happening to more than just me.