Occasionally you may want to create high definition or retina screenshots. To do this create an image capture with a width larger than the browser width. GrabzIt then scales the browser to stop the image being stretched. High Definition screenshots are slower and become even slower with larger dimensions for this reason it is recommended not to create too large an image. As such you will probably also need to specify a delay to give the screenshot chance to render.
Measurements taken when creating high definition screenshots are inaccurate, which is why full-length screenshots are not always perfectly sized in this mode and high definition is not currently available when targeting elements.