If a revision block is not used, where would a revision letter be located?

The revision letter is typically found in the lower right hand corner of the title block on architectural and engineering drawings. This placement serves a practical purpose; it allows for easy identification of the most recent changes made to the document while keeping the revision information organized and distinct from the main content of the drawing.

Having the revision letter in this designated corner helps to maintain clarity in the drawing layout, ensuring that users can quickly locate and reference changes without interfering with the other critical information typically presented in the title block. This standard practice aids in maintaining consistency across various documents and is widely adopted in the field to enhance communication and documentation accuracy.

The other choices either lack a standard location for revisions or suggest placements that would create confusion or disruption in reading the drawings.