Window mode
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Windows
To change the game from running full screen to running in a window, in the settings.txt file change
fullscreen=yes
to
fullscreen=no
The window size is given by.
size=
{
x=1280
y=960
}
EU3 allows freely defined window sizes, so you might want to modify it slightly in order to see f.x. the menu bar
size=
{
x=1270
y=930
}
Mac
The Mac game automatically starts in windowed mode. You can go fullscreen by using Command+F.

