Measurement Tool
The measurement tool lets you measure distances directly in the 3D scene. Click two or more points — on surfaces, projector lenses, object edges, or free space — and Experience Designer draws a labelled dimension line showing the distance in metres.
Activating the measurement tool
- Click the Measure button in the toolbar, or press M.
The cursor changes and the HUD at the bottom of the viewport shows measurement status.
Taking a measurement
- Activate the tool.
- Click a start point in the viewport. A dot and a snap indicator appear.
- Move the mouse — a live preview line shows the current distance.
- Click the end point to finalise the measurement.
- The distance label is drawn at the midpoint of the line.
Chain measurements
By default, the tool is in chain mode: after placing the end point, the next click starts a new segment from that same point. This lets you measure a series of connected distances (e.g., projector spacing along a truss) in one session.
Click Finish Chain (or press Enter) to end the chain and deselect.
Close loop
Enable Close Loop in the toolbar to automatically draw a closing segment back to the first point, creating a complete polygon measurement (useful for measuring room perimeters).
Snap modes
The measurement tool snaps to geometry to give you accurate results:
| Snap type | Visual indicator | Description |
|---|---|---|
| Vertex | Yellow circle | Nearest mesh vertex |
| Edge | Cyan circle | Nearest edge midpoint |
| Centre | Pink circle | Object bounding-box centre |
| Lens | Green circle | Projector lens origin |
| Bounding box | Orange circle | Nearest bounding-box face point |
| Grid | Green square | Nearest grid intersection |
Use Tab to cycle through snap priority presets:
- Preset 1: Lens → Vertex → Centre → Edge
- Preset 2: Edge → Vertex → Centre → Lens
Toggle snapping on/off with Shift + S.
Axis constraints
While measuring, press X, Y, or Z to lock the measurement to that world axis. A guideline appears to show the constraint direction. Press the same key again to release the constraint.
Managing measurements
- Click an existing measurement label to select it.
- Delete / Backspace to remove a selected measurement.
- Ctrl / Cmd + Z to undo the last measurement segment.
- All measurements are saved with the project.
Place projector at measurement point
When a measurement marker is selected, a context button Place Projector Here appears. Click it to add a new projector at the exact measurement point — useful for confirming projector positions match architectural dimensions.