"Age of Empires 3" is a real-time strategy game for the PC. As with most PC games, "Age of Empires 3" will automatically configure its settings based on the specifications of your computer and monitor. While there is no direct option to change the font size in the game, you can increase the font size by lowering the resolution. This will make dialogue and windowed text larger. However, because the resolution changes everything in the game, scenery and other objects will also grow in size.
Click the "Options" button on the main menu.
Click "Graphics Options." Click "Screen Resolution."
Click the drop-down box and select a resolution that is lower than that of your monitor. Upon loading the game, the game selected the default resolution based on the size of your monitor. The default resolution will be displayed on the side of the drop-down box. The lower the resolution, the larger the text.