Slightly decreases the magnification of the active view window.
When you select this command, the magnification of the active view window will be slightly decreased. As a consequence of this, the field of view will be slightly increased. If the resulting magnification is below a certain limit, a warning dialog will be displayed telling you that using such a low magnification can produce extreme "fisheye" distortion, which can be confusing.
Copyright © 2005-2021, AstroGrav Astronomy Software