If you cant stand the slow camera edge scrolling, you can change the value in 2 files to adjust it to your needs. Your mouse sensitivity isnt affected, if you want to change that, do it through windows or your mouse software.
Go to Documents/myGames/Dawn of War III and open the file configuration_user.lua with Notepad.
Then find setting =
"mousescroll",
value = 128,
valueType = 2,
and change "value = 128" to your needs. The possible values are 0-255. I changed mine to 180.
If you are a WASD or Arrowkey user change the corresponding values, which are located further below: setting =
"keyscroll",
value = 128,
valueType = 2,
Save and exit.
Then go to your folder where DoW3 is installed. In the main archive, where the RelicDow3.exe is stored, is a file called Sysconfig.lua, open it again with Notepad.
Press Ctrl+F and type Mousescroll (or Keyscroll) in the search field, press Enter. When found, edit the value 128 again to your liking.
Save and exit.
I only had sucess by editing both files, only one didnt work.