Features / Compare and revise
Trace Paper
See-through sheets to sketch on, each its own PDF layer.
More in Compare and revise
Compare what's openCompare an issue with any PDF you already have open.
Changes SinceOutline everything changed after a date or a revision.
Overlay PagesTwo to four sheets over each other, each in its own colour.
Detect RevisionsFill the revision schedule from each title block.
Place PDFLay a consultant's drawing over your sheet, then move, scale and tint it.