bin sets the binning factors for the CCD mosaic in the x and y directions. All subsequent observations use this binning until bin is run again or the observing system is restarted.
bin x ywhere x and y are the factors for the x and y directions respectively. Valid binning factors are integers in the range 1..4.
The binning factors may be different on each axis but the same pair of factors are used for all the science CCDs in the mosaic.
Selecting a binning factor higher than one on either or both axes drops the readout speed down to binned and leaves it there indefinitely. Use the rspeed command to restore a higher speed after you restore the binning to 1x1.