When compressing, in {TAIL ~ accordance} with a compression method which is designated by extra character registration information, the relevant compression method is selected and {HEAD ~ the bit map data} is compressed 
When compressing , in { TAIL ~ accordance } with a compression method which is designated by extra character registration information , the relevant compression method is selected and { HEAD ~ the bit map data } is compressed
OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL