Rotten_Mindpazerlol, there's no buttonRotten_Mindwhat to do if i have intel hd graphics?
https://puu.sh/sApLa/a237db7b27.png
This works for me on windows 8.1. basically for some backwards reason you don't get scaling options unless you use a 4:3 monitor res but you can just change it to 4:3, turn on scaling, go back to the native screen res and it will still enable scaling for any 4:3 game like TF2
Go here
http://puu.sh/sAKe1/1598b1acf5.png
change to 1024x768 or whatever 4:3 option the slider will give you. You'll now have a monitor res that's 4:3. Select Keep Changes if a window pops up
http://puu.sh/sAKhx/eda846de4d.png
Click the Advanced Settings and change the scaling to Scale Full Screen. Now your monitor will scale the 4:3 res so you should already see the scaling happening if you did things correctly up to this point
http://puu.sh/sAKkd/649c76ee25.png
Now close Advanced Settings and change back to your native resolution
http://puu.sh/sAKtJ/b3bfdbc77b.png
Now you can enjoy scaling in videogames. If you want to disable it again you'll have to go through the same steps (change monitor res to a 4:3 res, open advanced options, disable/enable scaling, change monitor res back to original res)