Geometry

Use the Up/Down buttons to nudge the image larger or select from the drop-down list of standard computer resolutions.
Using your mouse, select the area that you want to save... Clicking the Apply button will create a new picture that includes only the data within the bounding box.

Set the border color by clicking on the colored square. Set the width of each side or the border or with all sides locked. The image size will be increased by the border size.
Flip Vertical has no interface and is applied by selecting it from the drop-down menu. Flips the image upside-down.
Flip Horizontal has no interface and is applied by selecting it from the drop-down menu. Flips the image left to right.
De-Interlace has no interface and is applied by selecting it from the drop-down menu. Remove either odd or even numbered lines. Removes every other horizontal line to get rid of the interlacing artifacts. Each removed line is either replaced by the copy of the previous line, or the interpolation of the lines immediately above and below the current one. This makes the image somewhat blurry but removes the artifacts from the other field.