right-click the selection | Edit Selection ()
A dialog appears displaying the sequence. You can add, remove or change the text and click OK. The original selected part of the sequence is now replaced by the sequence entered in the dialog. This dialog also allows you to paste text into the sequence using Ctrl + V ( + V on Mac).
right-click the selection | Delete Selection ()
Note When editing annotated nucleotide sequences, the annotation content is not updated automatically (but its position is). Please refer to Edit annotations for details on annotation editing. Before exporting annotated nucleotide sequences in GenBank format, ensure that the annotations in the Annotations Table reflect the edits that have been made to the sequence.