Scrolling pans the drawing, with a mouse wheel or two fingers on a trackpad. Shift + scroll pans sideways. To zoom, pinch or hold ⌘/ctrl while you scroll. Lost the drawing? Press F (the Zoom to fit (F) button in the toolbar) to frame all of it.
The same rules apply in the plan and in the elevation panes.
Zooming without a wheel
Under the fit button in the toolbar is a − + pair. Each click is a quarter step about the middle of the drawing area — three of them roughly double or halve the scale. It is the answer when there is no wheel to spin (a trackpad set to pan, a touchscreen, a mouse with a dead scroll), and it is repeatable where a gesture is not, since every click is the same step. The percentage in the bottom-right corner of the drawing is the live zoom; each half greys out at its end of the range, the same limits the wheel stops at.
The zoom buttons and the fit button drive the plan, so they stand down in the 3D and elevation views, which navigate themselves.
Making the wheel zoom
If you are used to CAD, where the mouse wheel zooms, open the ⚙ in the top bar and set Navigation (this device) → Scrolling:
| Option | What plain scrolling does |
|---|---|
| Pan (default) | Every scroll pans. |
| Zoom | Every scroll zooms, the CAD convention. |
| Auto (detect device) | A mouse wheel zooms, a two-finger trackpad drag pans. |
Auto tells the two devices apart by evidence a wheel cannot fake: a sideways component, or a fractional step. A high-resolution mouse can still report like a trackpad, and then Auto reads it as one.
Pinch and ⌘/ctrl + scroll zoom in all three.
This setting belongs to the browser you are sitting at, not to the plan: which pointing device is on the desk is not a property of the drawing, so it never travels with the file and never follows you to another machine.
What this doesn’t do
- No middle-mouse pan. Panning is scrolling (or the trackpad drag in Auto), and the fit button reframes. The toolbar zooms, but nothing there pans.
- The browser will not page-zoom under a pinch. That is deliberate — a pinch over the drawing zooms the drawing, not the window.
Next
Keyboard shortcuts for the rest of the navigation keys, and snapping, whose tolerances are in screen pixels — which is why they feel the same however far you have zoomed.