[Markus Heinsohn]

Nowadays, with various different display resolutions and related OS settings, it can happen that OOTP by default runs in a non-native resolution and looks weirdly blurry or scaled wrong. For this, you can try the following:

First attempt, change in game setting:
If you open OOTP 25 and everything is so small you can read it on 4k and 8k (1400 and 2160 resolutions) there is a very simple fix built into OOTP.

Click on SETTINGS either on the OOTP entry screen or in the File menu if you have a game loaded. Click on the Expert tab and down where it says "Use Windows DPI Scaling" turn that to "Always Off". Then close the game and reopen it and your font and scaling will look like it did in OOTP 24.

PC Windows
1. Locate the OOTP 25 shortcut (or the OOTP25.exe)
2. Right-click it, select Properties, select the Compatibility tab and toggle the setting for high DPI scaling.
3. Start the game.

The same may also work if you do it on your Steam client shortcut in case you use the Steam version of OOTP.

There is also a setting for what scaling setup to use. In the Settings button on the main page, in the Expert tab, there is a setting for 'Use Windows DPI Scaling'. The default will attempt to adjust to your monitor settings, but if that does not work, you may want to try either Always On or Always Off. You will need to restart your game after changing that setting to see a difference.

Another possible solution is to set the Windows interface scaling to 100% (or some other setting) prior to starting OOTP:
1. Open Windows Settings
2. Click on System
3. Click on Display
4. Under the "Scale and layout" section, use the drop-down menu and select the scale settings that suit your needs. Options available include 100, 125, 150, and 175 percent.

macOS
1. Go to wherever the app OOTP is located, most likely in the Applications folder.
2. Right-click on the app icon, and select “Get Info” to bring forth the information dialog box for the app.
3. When the Get Info dialog box opens, you should see an option that says “Open in Low Resolution.” What you need to do here is checkmark the box next to the option.
4. Close the Get Info dialog box after you have checked the option.
5. Start the game