How Do I Get OBS to Start Up Maximized And Fill The Entire Display?

[Goodguy6]

I have two monitors. The first, primary, is set to 4K. I want to startup OBS on my second monitor, which has 1920x1080 resolution. Both Base (Canvas) Resolution and Output (Scaled) Resolution are set to 1920x1080. However, when the program starts, it fills just the upper-left portion of my screen, sort of as if it were running on the 4K monitor resolution.

How do I get OBS, in Admin mode, to fill the entire screen on my second monitor when it first starts up?

Also, I saw a command line to run OBS: start /max /d "C:\Program Files\obs-studio\bin\64bit" "" obs64.exe --startvirtualcam However, my PC doesn't recognize the "start" part of the command. What's going on here?

 

[Goodguy6]

With all the "whizzbangs" on this site, you mean to tell me NO ONE knows how to maximize the OBS window when the program opens!? :-(

 

[Gamer_Senpai]

With all the "whizzbangs" on this site, you mean to tell me NO ONE knows how to maximize the OBS window when the program opens!? :-(

lol @whizzbangs. i know this thread is old now, but were you able to find a solution to this? because i am currently facing the same issue. I just updated to obs v28.0.3 and everytime i start it up it just loads as a tiny box in a corner of my screen till i have to manuallly maximize it. However i did try one thing, didnt work for me tho, but hell, you might as well give it a shot maybe it'll work at your end. right click on obs shortcut and select properties.. then click on the shortcut tab then go to run: maximized. i attached a pic below.
Also, one more issue ive always had with obs, it just never saves it ui position upon exiting, so each time i launch it afresh, it never remembers the last preview window position, i always have to move the preview window and shrink it everytime so that i can see more of my obs scenes and sources list. I was really hoping this would have been fixed with the new updates but sadly, it still isnt.