Features / Annotate
Mark-up tools built for construction
Not another generic PDF editor. CoBuild's annotation tools are purpose-built for construction plans — trade-specific symbols, smart connectors, and a quantity table that tallies itself.
Stamps
Drop trade-specific symbols directly onto your plans. Choose from built-in icons, upload your own, or create custom stamps with any colour, size, and rotation. Organise them into folders so your most-used stamps are always one tap away.
- Custom icons, colours, and sizes from 6px to 64px
- Rotation in 15-degree steps for precise placement
- Organise into folders for fast access on every project
- Trade-specific symbol library built for construction
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Connectors & Relationships
Link stamps together to show dependencies, flow, and relationships between elements on your plans. Connectors bend around obstacles with waypoints, and chain detection automatically groups related items so nothing gets missed.
- Waypoints for precise path bending around obstacles
- Chain detection groups related stamps automatically
- Custom colour, width, and line styles per connector
- Visualise flow and dependencies at a glance
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Text, Shapes & Freehand
Add callouts, highlight areas, and sketch directly on your plans. Rich text formatting, over eight shape types, freehand drawing, and image annotations give you every tool you need to communicate clearly — without leaving the plan.
- Rich text with formatting for clear callouts and notes
- Rectangles, circles, arrows, clouds, and more
- Freehand drawing for quick sketches and mark-ups
- Drop images directly onto plans for reference photos
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Measurements & Quantity Table
Calibrate your plan once, then measure distances and areas with precision. Every stamp you place is automatically tallied in a quantity table that updates in real time -- no manual counting, no spreadsheets, no mistakes.
- One-time calibration for accurate distance and area measurement
- Auto-tallying quantity table that counts every stamp type
- Table renders directly on exported PDFs for handover
- Position the table anywhere on any page
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Ready to get started?
Upload your first plan and start annotating in under a minute. No training required.