Drawing aids
Object snapping and snap options, grid settings, orthographic 2D view, measure tool and camera keyboard shortcuts
Object snapping (Snap, F3)
Object snapping makes mouse clicks snap to grid and object points when drawing and transforming. It is toggled on and off via the toolbar button 
Snap or the F3 key. The currently snapped point type is shown in the scene (e.g. “Grid point”, “Object”, “Drawing”).
Snap options
The small arrow button next to the Snap button opens the snap-options window; it stays visible as an overlay in the scene. Groups and options:
| Group | Options |
|---|---|
| Grid | Grid plane — snap to the grid-line intersections |
| Building objects | Vertices, Midpoints, Edge midpoints of surfaces; Distance: snap radius in px |
| Network objects | Nodes, Pipes (only relevant with heat networks) |
| Drawings | Drawing points, Drawing intersections, Lines (snap along lines); Distance: in px |
| Other | OSM buildings, PDF / Bitmaps |
Additionally: Soft axis lock — during interactive transformation the movement snaps in as soon as the cursor hovers near an axis of the local coordinate system; the lock releases again when moving away.
Grid
The main grid lies at z = 0 by default and is shown/hidden via View > Show main grid at z=0; View > Show ground plane toggles the closed ground surface.
The size and subdivision of the grid are part of the location properties: toolbar mode Location, Grid settings group with Main grid line spacing:, Extent: and View depth: (each in m) as well as World coordinate origin (X/Y/Z, UTM zone). When drawing rooms, the grid plane is temporarily moved to the elevation of the chosen storey, see Draw rooms.
2D mode (orthographic top view)
The button 
2D mode switches the scene into an orthographic top view — ideal for tracing floor plans over imported DXF/PDF references, since lengths appear undistorted. In the parallel projection, the directional views from the View menu (from north/east/south/west/above) change the orthographic viewing direction instead of moving the perspective camera; pressing the button again returns to the 3D perspective.
Measure tool
The button 
Measure activates the distance measurement mode: click a start point and end point in the scene (object and grid snapping apply). The Distance overlay window shows:
- Start point: and End point: (x/y/z in m)
- Distance: — distance in m
- Offset: — differences per axis
- Use local coordinate system — display of the values in local instead of world coordinates
- Copy information — copies the measurement values to the clipboard
Clicking the Measure button again ends the mode.
Views & camera keyboard shortcuts
The View menu provides standard camera positions:
| Command | Shortcut |
|---|---|
| View from north | Ctrl+2 |
| View from east | Ctrl+4 |
| View from south | Ctrl+8 |
| View from west | Ctrl+6 |
| View from above | Ctrl+5 |
| Bird’s-eye view from south-west / south-east / north-west / north-east | Ctrl+1 / Ctrl+3 / Ctrl+7 / Ctrl+9 |
| Find selected geometry — camera jumps to the current selection | Ctrl+G |
| Reset view — camera back to the initial position (view from above onto the coordinate origin) | — |
All further navigation and selection shortcuts are summarized under Keyboard & mouse.
Good to know:
When tracing floor plans from PDF or DXF references: activate 2D mode, in the snap options check only “Drawings” (points, intersections, lines) and temporarily disable the building-object snaps — that way the cursor does not jump to your own already-drawn surfaces but follows the template cleanly.