The program also has additional tools which will make your work simplier.
They are available in both Auto and Manual modes.
To scroll the image in the Image Window you can also press the spacebar on the keyboard and drag the image with the left mouse button.
Double-clicking on the tool's icon on the Toolbar makes the image fit the Image Window.
To zoom in left click on the image. To zoom out left click with Alt on the image. You can use hotkeys to change the image scale.
It is also possible to increase the scale of the selected area. For this purpose press and select a rectangular area on the image. When the rectangular area is selected, the image scale will be changed so that the selected part of the image will fill the whole window.
Double-clicking on the tool's icon on the Toolbar makes the image scale to 100% (actual size).