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The first step for installation is to obtain the program. It can be downloaded by pressing the right mouse key on 'download'. Installation is straight forward.
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You can change the orientation from portrait to landscape and visa versa. Click on Layout → Orientation.
A dialog will popup. You may either choose portrait or landscape.
2) Zoom in
Maybe not all of your graph is interesting. Therefore you may like to zoom in on your data. Click on Layout → Zoom → Zoom in.
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