Unit size

Where do I set the unit size? I want to max them but I can't find it.....and can I do this while playing a campaign as well?

It´s under graphic options, select "advanced settings", then you´re able to choose unit sizes.
You can change it while playing the campaign, but a change will only affect a new campaign (i.e. if you started a campaign on Large and change to Huge later, the units in your campaign will remain on the Large setting).

Thanks a lot :)