The panel on which you type or edit blocks of data is a data entry panel called an edit panel. At the top (or bottom) is a COMMAND field for entering commands that the panel accepts, but the bulk of the panel is for data. When no data has been entered, you see empty space with single quotation marks on the left.

EDIT ---- PREFIX.TEST.DATA ------------------------------------- COLUMNS 001 072
COMMAND ===>                                                    SCROLL ===> HALF
****** ************************ TOP OF DATA ************************************
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
'
****** ************************** BOTTOM OF DATA *******************************

When data is entered in the blank space, the single quotation marks become line numbers. To exit and save the data on an edit panel, enter the END command on the COMMAND line.

EDIT ---- PREFIX.MEMO.TEXT(FEB27) ------------------------------ COLUMNS 001 072
COMMAND ===>                                                    SCROLL ===> HALF
****** ************************ TOP OF DATA ************************************
000001 My Dear Sir,
000002
000003    In response to your urgent request for my immediate
000004 presence, I am beginning the process of asking for a leave
000005 of absence.
000006     With any luck, I should be able to meet with you
000007 shortly and should be able to spend at least a fortnight
000008 with you working out the details.
000009    I am anticipating your discourse on the particulars of
000010 this extraordinary case.
000011
****** ************************** BOTTOM OF DATA *******************************