Selection of a sequence region is synchronized between different Sequence View components.
Selection in the Sequence View components
In the Sequence Overview the selection is displayed as a blue line:
In the Zoom View a blue line with coordinates and the length of the selected region is shown:
In the Details View a rectangle with a dashed border is shown around the selected region:
Finally, when one selects an annotation in the Annotations Editor, the corresponding region is also selected in the other components and visa versa.
Selecting a region using the mouse
It is possible to select a region of a sequence using the mouse in each component of the Sequence View.
In the Zoom View and the Details View tit can be adjusted by dragging the left or the right border of the selection:
Selecting a region using the dialog
If the region coordinates are known, to select it click the Select sequence region button 
on the toolbar, choose Select–>Sequence region in the context menu of the Sequence View. The Region Selection dialog appears:
It is possible to choose:
- Single Range Selection — a common region with a single range. Use the Min and Max buttons to set up the beginning and the end of the sequence.
- Multiple Range Selection — a region consists of several join elements. For example, this may be exons. See "The DDBJ/ENA/GenBank Feature Table Definition" for details.
Selecting a region around or between annotations
To select a region between two annotations, for example, an intron region between two exons:
- Click on the annotations, holding the Ctrl/Cmd key:
- Click Select–>Sequence between selected annotations in the context menu of the Sequence View.
To select a region that contains both annotations, choose the Sequence around selected annotations item in the menu.