In the -GC lines table, you can enter comments on the Database Block.
These lines are used for documentation purposes. Comments are available with all entities. You can write or edit text in relation to the selected instance. You can write, modify, move, or delete text lines by using basic word-processing functions.
Moreover, if this line is not correct, this column also displays an error or warning symbol, depending on the severity of the error. A hover help indicates the source of the error.
On a blank-type line you enter a free comment.
On an A-type line you enter the COBOL Segment name.