box=1,1,256,256The box can be created either by specifying a fits file or by a box definition.
Multiple box definitions can be placed on the command line and the resultant box will the the overlap (AND) of the boxes.
box= uses the specified box as a starting point.
fits= creates a box with starting rows and columns of 1 and the number of rows and columns in the fits image that is specified.
dr= shifts the box by the specified number of rows.
dc= shifts the box by the specified number of columns.
rot= rotates the box by the angle in degrees. Note: for angles near 90 and 270, the number of rows and columns are interchanged in a behavior similar to that it rotate. An attempt to trim for the non-modulo 90 degree part is also made.
nmatch= argument is accepted but ignored as a courtesy for the match program.