Open a PDF to start placing dimension annotations
or drag & drop a PDF here
Name this material and choose colours for annotations and label backgrounds.
| ↖ Select S | Select, move and resize annotations. Drag handles to reposition endpoints. |
| ⟺ Dim D | Click two points to place a linear dimension. |
| 〽 Perim P | Click multiple points. Click near start or double-click to finish. Measures total length or closed perimeter. |
| ⬡ Area A | Click polygon vertices. Click near start or double-click to close. Reports area with hatch fill. |
| ⊙ Sym Y | Place symbol stamps (circle, square, triangle, star) for point counts. |
| 📋 BOM B | Place a Bill of Materials table — summarises all annotated quantities grouped by material. |
| 💬 Comment M | Comment tools: ☁ Cloud (freeform poly), ✏ Text Box (drag), ↗ Callout (drag + moveable tip), ▬ Highlight (drag). Double-click any comment to edit text. |
| 📝 Remarks R | Place a Remarks table — lists all comment annotations on the page. |
| 📐 Cal C | Calibrate scale — click two known-distance points, enter the real distance. |
Pick an active material before drawing — every new annotation inherits its colour automatically. Or select any existing annotation and assign a material after. Use the ✎ pencil in the material dropdown to edit a material's name or colour; all linked annotations recolour in one go.
| S D P A Y M B R C | Switch tools |
| Escape | Cancel in-progress annotation / deselect |
| Del / Backspace | Delete selected annotation |
| CtrlZ | Undo |
| CtrlY / CtrlShiftZ | Redo |
| Shift + drag | Orthogonal lock (0° / 45° / 90°) while placing a dimension |
Scroll wheel or pinch to zoom · drag the background to pan · ◀ ▶ or arrow keys to change pages.
Type a ratio (e.g. 1:100) in the Scale field, or click 🔍 to auto-detect from PDF text. Changing scale recalculates all existing measurements instantly.
Tap the first calibration point
Select a scale found in the PDF text