Zooms out on the viewing area.
The Zoom Out tool displayed above is used to reduce the viewing scale of the data base by a factor of two around a selected position of interest.
To use the Zoom Out tool, select the tool by clicking it with the accept mouse button. Then move the cursor into the viewing area and press the accept mouse button at the centre of the area of interest.
The data base will be redrawn at a reduced scale with the selected position of interest in the centre of the viewing area. That is, you will see more of the data base but at a smaller scale.
Control will stay in the Zoom Out tool allowing you to progressively reduce the viewing scale around further selected positions of interest.
Clicking the snap mouse button will exit the Zoom Out tool and return operation to the previously selected command. The Zoom Out tool may also be exited by selecting any other tool or command.