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MetricCanvas Navigation and Keyboard Shortcuts
MetricCanvas works on an infinite canvas, so you can place several plans and photos side by side and zoom deep into details. This page lists every navigation gesture and keyboard shortcut so you can measure faster.
Trackpad and Magic Mouse
Scroll with two fingers (or swipe on a Magic Mouse) to pan the canvas in any direction. Pinch to zoom in and out — the zoom is centred on the cursor, so the detail you point at stays in place. It works in Chrome, Edge, Firefox and Safari.
The browser page does not scroll or zoom while the cursor is over the canvas, so gestures always move your drawing.
Mouse and touch
With a classic mouse, hold Ctrl or Cmd and turn the wheel to zoom at the cursor; turn the wheel alone to pan vertically and add Shift to pan horizontally. Drag with the middle or right button to pan at any time, whichever tool is active.
Hold Space and drag to pan temporarily without changing tool. On phones and tablets, drag with one finger to use the active tool and pinch with two fingers to zoom.
Keyboard shortcuts
+ / -: zoom in and out · 0: zoom to 100% · 1: fit all images on screen · Arrow keys: pan (hold Shift for bigger steps) · Esc: cancel the line you are drawing, close the calibration dialog or clear the selection · L: line tool · C: circle tool (press again to switch diameter/radius) · R: rectangle tool (width × height and area) · X: change the selected line style (solid, dashed, dash-dot) · A: select · H: pan · K: lock or unlock the selected line · Cmd/Ctrl + Z: undo · Cmd/Ctrl + Shift + Z or Cmd/Ctrl + Y: redo.
While drawing or dragging a line end: Cmd/Ctrl keeps it at 0° or 90°, Alt snaps it to 45°, and Alt + Cmd freezes the current angle. Points stick magnetically to the midpoint and ends of other lines; hold Shift to place a point freely near them.
Toolbar zoom controls
The zoom pill in the toolbar shows the current zoom level. Use − and + to zoom around the centre of the view, 100% to return to actual size and the fit button to frame all visible images.
The zoom range goes from 5% to 2000%, enough to see a whole site plan or to place a point on a single pixel.