Widescreen ?

[Ygorl]

Use "-r 1920 1200" for example to set the [r]esolution to 1920x1200. This is a command-line switch; the exact way to use it varies by operating system. Windows you make a link to the .exe and append the switch in the properties window of the link; on my Mac I start the game with an applescript that looks like:
do shell script "cd ~/Desktop/Dominions' '3/Dominions3.app/Contents/Resources/; ../MacOS/Dominions3 -r 1920 1200"
and if you're using Linux, you probably know how to use a command-line switch.