Here are the steps on how to take a screenshot in Steam:

To take a screenshot of the entire game:

1. Press F12 on your keyboard.
2. The screenshot will be saved to your Steam screenshots folder.

To take a screenshot of a specific area of the game:

1. Hold down the Alt key and press F12 on your keyboard.
2. The screenshot will be saved to your Steam screenshots folder.

To take a screenshot of the Steam overlay:

1. Press Shift+Tab on your keyboard.
2. The Steam overlay will be opened.
3. Press F12 on your keyboard.
4. The screenshot will be saved to your Steam screenshots folder.

To change the screenshot settings:

1. Open Steam.
2. Click on Steam in the top left corner.
3. Select Settings.
4. Click on In-Game.
5. Under Screenshots, you can change the following settings:
   • Screenshot format: You can choose between PNG and JPEG.
   • Screenshot quality: You can choose between low, medium, high, and lossless.
   • Screenshot folder: You can choose the folder where you want your screenshots to be saved.