Menu: View->Zoom
Mouse menu: Zoom
Toolbar: 
Zoom is used to change how large or small objects appear in the window.
- Zoom in: Pick inside the graphical window. A dynamic box is opened. Pick again and the visualization changes to display only the part within the defined box.
- Zoom out: Pick inside the graphical window. A dynamic box is opened. Pick again and the visualization changes so that everything in the graphical window is reduced to the size of the box.
- Zoom dynamic: Left-click on the point that is to be the centre center of the zoomed image. Moving the mouse to the right enlarges the image and moving the mouse to the left reduces its size. Left-click once more to finish.
- Zoom previous: GiD goes to the previous saved zoom.
- Zoom next: If Zoom previous has been selected, this option goes back to next view in the list.
- Zoom frame: Choose a visualization size so as to display everything inside the window.
- Zoom points: Enter two points (see Point definition), and a visualization size is chosen so as to display these two points inside the window. This option only appears in the Right buttons menu (see User Interface).
...