When you copy a section from a long sequence and paste it into a new MacVector window, the original numbering from the original sequence is retained. This is very useful if you want to work on a shorter segment of a genome without losing the original numbering. However, sometimes it is preferable to have the numbering start at “1”. Its simple to do that in MacVector: just right-click in the Editor tab of the sequence window ([control]-click if you have a single button mouse or trackpad) and choose Reset Origin to 1 from the popup menu.
