Beware of Screenshots. Make them freely but keep track of them. They are TGA files, which are huge. Some are 5 megabytes or more. The other day, I noticed I had a lot of them I never looked at, but just left hanging around. I discovered they were taking more than a gigabyte of disk space. That can matter.
Recommend you convert them to JPEG or Bitmap files and keep them in your Pictures or other directory, or save them to a CD or DVD and clear the screenshots file periodically.
Bernie