1. Pull up the screen you want a snap shot of.
2. press ctrl and prt screen (top right of keyboard) at the same time.
3. Go to you photoshop site, whichever one you're using.
4. press paste
5. You can remove the stuff around the sides by cropping.
6. Save your file as a PDF.
7. Upload to your thread.
8. Don't forget to add the link to your site.
Hope that works.