My method:
1. Download a casino
2. Open one of the games
3. Hold down Shift and press “print screen”
4. Open Photoshop
5. Create new image file
6. Paste (Ctrl+V)
7. Select the “game” part of the screenshot, and copy it to the clipboard (Ctrl+C)
8. Create another new image file (will automatically be the right size)
9. Paste into the new image file
10. Resize new image
11. Add watermark if desired
12. Save the file “for web” (optimizes image so it isn’t a huge file)
13. FTP image to server