Add punctuation: Small extent would occur in ancient times indicate some messages
A: Small extent would occur in ancient times, indicate some messages.

Add punctuation: It also needs to allow the printing of barcodes fonts and other features that are not native to the printer
A: It also needs to allow the printing of barcodes, fonts and other features that are not native to the printer.

Add punctuation: Definition Free form text applying to the Catalogue Used for humanreadable information
A:
Definition Free form text applying to the Catalogue. Used for human-readable information