In DNA Finger Printing, ‘blotting’ refers to

Transfer of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon is called blotting.

Detection of hybridised DNA fragments on X-ray film is called autoradiography.

Cutting DNA by restriction endonucleases is called restriction digestion.

Separation of DNA fragments based on charge is done by a technique called electrophoresis.