How do I copy a DNA or RNA sequence to the clipboard?
Open a DNA or RNA File

Open a DNA or RNA file in SnapGene.
In Map view or Sequence view, select the region of sequence to be copied.
Copy the Selected Nucleotide Sequence

Click Edit → Copy Top Strand Bases to copy the Top (forward) strand in the 5'-3' direction.
Click Edit → Copy Bottom Strand Bases → (5'→3') to copy the bottom (reverse) strand in the 5'→3' direction.
Click Edit → Copy Bottom Strand Bases → (3'→5') to copy the bottom (reverse) strand in the 3'→5' direction.
The sequence will be copied to the clipboard.
Copy the Translation of the Selected DNA Sequence

Select a coding sequence (CDS) feature in Map or Sequence view and click Edit → Copy Amino Acids → to copy the translation in either 1 letter or 3 letter code.
The sequence will be copied to the clipboard.
If you want to create a new file based on the translation of a CDS then see Make a Protein Sequence from a DNA Sequence.