The file type "PDF" is short for "Portable Document Format." If you want to take a snapshot of a particular section of a PDF and save it as an independent file, you can do so using a native tool inside of the Windows operating system.You can use the native program Microsoft Paint to save your PDF snapshot as a BMP file.
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Double-click on the PDF file to open it in your PDF reader.
Scroll down in the document until you reach the part you want to copy.
Click "File" in the program and select Create PDF." Click "From Screen Capture." This will take a snapshot of the current screen and save it as a PDF file. You can also select "From Window Capture" to only snapshot the current open PDF window and not anything else on-screen.