
@C1@c@b@_ Magnify

     To magnify a rectangular region of an image by pixel replication,
     up to the maximum window size.

@b Interaction:
@f leftmouse:
     Magnify the current region to the window size.  If control key is
     down, increase zoom{x,y} factor by decreasing the region of interest.

@f middlemouse
     Magnify the current region to the window size.  If control key is
     down, decrease zoom{x,y} factor by increasing the region of interest.

@f rightmouse
     Pop-pup menu to change rubber color and shortcuts for setting
     zoom factors

     The mouse commands always increment or decrement the zoom factors
     uniformly in the X and Y directions when possible. To adjust separately
     the magnification factors, use the following keyboard command:

     X:   Increase zoomx by decreasing region
     x:   Decrease zoomx by increasing region
     Y:   Increase zoomy by decreasing region
     y:   Decrease zoomy by increasing region
     0:   Reset so that zoomx = zoomy
     Esc: Return to main

@s@b Note
1.   Only integer magnification factors are supported
2.   Window size takes precedence over zoom factors, and sometimes 
     it may seem counter-intuitive.
3.   In single buffer mode, can't maginify regions outside the image.
