User guide

Gel Doc
3-11
Highlight Saturated Pixels
When this box is checked, any saturated pixels in the image will appear
highlighted in red in the scan window and in the pop-up image window. To
view/hide saturated pixels in the pop-up image window, use the Image >
Transform command.
Invert Display
This checkbox will switch light spots on a dark background to dark spots on a
light background, and visa versa. This will only affect how the image is
displayed on the screen, not the actual image data.
Auto-scale
Clicking on Auto-scale will adjust your displayed image automatically. The
lightest part of the image will be set to the minimum intensity (e.g., white),
and the darkest will be set to the maximum intensity (e.g., black). You can
then “fine tune” the display using the High, Low, and Gamma sliders
described below.
High/Low Sliders
If Auto-scale doesn’t give you the appearance you want, you can use the High
and Low sliders to redraw the image yourself. Dragging the High slider
handle to the left will make weak signals appear darker. Dragging the Low
slider handle to the right will reduce background noise.
You can also type specific High and Low values in the text boxes next to the
sliders. Clicking anywhere on the slider bars will move the sliders
incrementally.
Gamma Slider
Some images may be more effectively visualized if their data are mapped to
the computer screen in a nonlinear fashion. Adjusting the Gamma slider
handle changes the light and dark contrast nonlinearly.