Once page mode has been initiated, a column indicator appears on the top line of the screen that specifies actual text columns for a record in the file. The indicator is determined by the file type. The file type CSEQ has a blank column 6. In this case, a space for column 6 does not appear on the screen. When nonblank data is transmitted in columns past the end of the indicator but within the text field, the record is changed. If the nonblank data is not within the text field, an error message is displayed. If the sequence number field is shorter than five characters for a file type, the word NEXT+ overflows into the column indicator.