Everything is drawn as vector and merged back into the original PDF, so it stays sharp
at any zoom or print size, with labels that remain selectable, searchable text.
AutoCAD-style dimensions
Drag A to B, pull the dimension line out, then type the value and unit. Extension lines, arrowheads and label, done properly. Figures are always typed by hand. The program never invents a measurement from the drawing.
A magnet that grabs the PDF itself
Snaps to annotation corners, to any point along an edge, and, unusually, to the dark lines of the underlying drawing. Start a dimension exactly on a wall, not near it. The crosshair sits on the snapped point, so you see where the click lands before you press.
Lines, arrows, curves, text, images
Plus rectangle, rounded, ellipse, triangle, cloud and polygon, each with its own stroke colour, fill colour and 5 to 100% opacity, so a blue outline over light yellow shading keeps the drawing underneath readable.
Five typefaces, bold, italic, underline
Helvetica, Times and Courier (the ones a PDF carries without a font file), plus Roboto and PT Serif, which the tool ships itself and writes into the exported file, so the page looks the same on a machine that has never heard of them. Any combination of bold, italic and underline, on notes, dimension labels and area labels; restyle something already placed by selecting it first. Either way the exported label stays selectable, searchable text rather than a picture of text.
Real editing, not stamps
Select one or many: shift-click, Ctrl+A, or sweep a box (blue catches what is fully inside, green catches whatever it touches). Drag the blue points to reshape, hold Shift to lock straight, reorder in the Layers panel, copy and paste between pages.
Pages and layers in one sidebar
A scrollable thumbnail strip marks every page that already carries annotations. Thumbnails render in the background, whatever you scroll to gets drawn first, so a hundred-page drawing set opens instantly.
Save the markup, or export the PDF
Save Project writes a small .json of annotations and leaves the original PDF untouched. Export PDF shows a confirmation first, listing the source file, the annotation count and which pages are marked, and only then writes the merged file.
