Stretching can be accomplished manually though the Histogram Module or automatically through the preset stretches.  


To use one of the preset stretches right click on the image and select the "Auto Stretch" to be applied to the image. From the menu bar, simply click the "black and white gradient button".

 


To manually stretch the image drag the black and white points in the histogram module.  The lower histogram displays the stretch as it is applied to the image.



You can also select "Auto Stretch" which will apply a low stretch to any newly captured images.


Stretching images can be accomplished in a variety of ways at different precision:


  • Baseline: Use auto stretch as described above. The aggressiveness of auto stretch can be set in the general options dialog.
  • Coarse Movement: Use the mouse to drag the black and white point on the histogram.
  • Fine Movement: Use the mouse wheel or track pad scroll.  This will move the black or white point by 100 ADU for each increment.  You must set your mouse to control stretching here.  Holding down the ALT key while moving the mouse wheel will alter the black point and without the ALT key, the white point
  • Semi Fine Movement: Use the SHIFT key + left and right arrow keys to make precise movements (50 ADU per click).  Holding the ALT key will cause movement of the black point, otherwise these changes will always affect the white point.
  • Precision Movement: Use the left and right arrow keys to make precise movements (10 ADU per click).  Holding the ALT key will cause movement of the black point, otherwise these changes will always affect the white point.