How do I change window size?

Question

Looking in the video settings there appears to be only one interface resolution setting that allows me to play windowed and the screen is tiny, I also can't resize the window.

How do I play in a larger window, or alternatively, tab out of a full screen window without minimising the game?

Answer 1

From the Arma2 Startup Parameters page:

1. Add "-window" to your command line/shortcut
2. In arma2.cfg add the following lines:

Render_W=2400;
Render_H=1500;
Resolution_W=1920;
Resolution_H=1200;

Resolution sets the interface size and Render sets the 3D rendering resolution.