Display Parameters Area

Min and Max

adjust the minimum and maximum data value between which the display will be scaled. In other words, they are used to set the contrast of the image displayed. In spectrum mode, they select the plot limits in the Y direction.

Full Scale

will scale between the minimum and maximum data value, which is normally appropriate as long as there are no outlying pixels or undesired intensity variations.

Show Histogram

(disabled in spectrum mode) opens a window for a more sophisticated contrast adjustment (see Sec. 5.5.1).

Gamma

(disabled in spectrum mode) allows for a gamma correction to be applied to the dataset. This allows for increased contrast in the bright regions at the expense of decreased contrast in the dark regions, or vice versa. See Sec. 5.14.1 for a gamma correction applied to the colortable.

Reset Gamma to 1

(disabled in spectrum mode) does ...guess what!

Zoom

(disabled in spectrum mode) allows for zooming between 0.25 and 4. A zoom of 1.0 means that one scan pixel is displayed in one screen pixel. Also see the next item in this list.

True Aspect Ratio

(disabled in spectrum mode) If this box is unchecked, the display will (on zoom stage 1.0) display one scan pixel in one screen pixel. This will stretch the image compared to the real sample if the pixel sizes (scanning step sizes) in X and Y are different. If the True Aspect Ratio box is checked, the Y direction will be stretched or compressed to make the X and Y pixel size equal on the display. In this case, the zoom value will be true only for the X direction.

Note: If the True Aspect Ratio box is unchecked and the pixel size in X and Y are different, the scale bar below the image will be correct only for the X direction. If the box is checked, the scale bar will be correct for both dimensions.