A Guide to Scaled Drawing, Dimensions, and Line Styles in SketchUp LayOut

SketchUp LayOut lets you manage dimensions, scale, and line appearance separately when bringing SketchUp models and 2D drawings together on a presentation sheet. The tools described in SketchUp’s official help documentation make it possible to create scaled drawing groups, take measurements from model viewports, and style lines by tag. The steps below follow the LayOut workflows described in the official documentation; the documents do not specify a particular applicable software version.

1. Create the scaled drawing inside the right group

To apply a scale in LayOut, the drawing geometry must be inside a group. The scale affects the geometry of LayOut entities in the group, while entities such as text, labels, and dimensions retain their existing properties, including line and text size. This lets you draw geometry to scale while preserving the appearance of annotations on the sheet.

1. To start a new scaled drawing, go to Window > Scaled Drawing and click Make Scaled Drawing in the panel that opens.

2. Choose a drawing scale in the panel. Optionally, use the Length menu to select Decimal, Architectural, Engineering, or Fractional format; depending on your selection, unit options such as meters or feet may be available.

3. Work inside the group using the drawing tools. When you’re done, double-click the drawing area outside the group or press Esc.

4. If you’ve already started drawing, select the relevant entities and group them using Make Group in the context menu. Right-click the group again and apply a scale from the Scale submenu.

Changing the scale later resizes the geometry. If you applied the wrong scale initially, use Remove Scale to clear it and start again; this prevents incorrect dimensions from carrying over into later edits. A dashed outline around a scaled group indicates that it is scaled; you can see the current scale while the group is selected.

2. Check dimensions according to the view type

LayOut treats the paper space and SketchUp model space differently. Entities outside a model viewport are in 2D paper space, where a dimension shows the actual distance on the page. A dimension inside a SketchUp model viewport corresponds to a length in the model. If a dimension starts in a model viewport and ends on an entity in paper space, its value is shown relative to paper space.

1. For a linear dimension, go to Tools > Dimensions > Linear. Click the start and end points, move the cursor away from the dimension line to position the extension lines, then click to place it.

2. In a perspective view, a dimension can show the actual distance; in an orthographic view, it measures the projected distance. If you need a projected measurement, make sure the model view is orthographic. The SketchUp Model panel can help you determine whether the view is orthographic.

3. To measure an angle, select Tools > Dimensions > Angular. After identifying the two sides of the angle and its vertex, move the dimension line in the desired direction and click to place it.

4. Object Snap must be on for dimensions to update in response to the model. Check its status in the Arrange menu; if the menu shows Object Snap Off, the option is off.

In tight spaces, LayOut may automatically move dimension text away from the line and display it with a leader line. To prevent this, select No Leader from the Leader Style list in the Dimension Style settings. To set the dimension appearance in advance, open the Dimension Style panel while the dimension tool is selected; use the Eyedropper tool to apply the same style to existing dimensions.

3. Establish line hierarchy in model viewports

After selecting a SketchUp model view, adjust Line Scale and the line display style in the Viewport section of the SketchUp Model panel. Line Scale affects the thickness of viewport lines and the scale of dashed line patterns defined in SketchUp. The documentation describes the default line width as 0.5 pt and the dashed line scale as “auto”.

Vector and Hybrid modes produce crisp vector lines. Vector is described as suitable and efficient for clean drawings that don’t include image textures. Hybrid also processes image textures, transparency, and shadows, but redraws may take longer while you work. Lines may appear less sharp in Raster mode, but visual options such as sketch edges, back edges, fog, and depth cueing are available. The documentation also notes that transparent surfaces tend to look better in Raster mode.

For tag-based control, open the Tags section of the SketchUp Model panel. You can edit each tag’s line pattern, color, scale, and weight separately. The “auto” scale setting for a tag preserves the dashed pattern scale as the line weight changes. If you’re aiming for a specific line standard, the official example uses a viewport Line Scale of 1.0 and assigns 0.4 pt to the Walls tag. If the view’s Line Scale is left at 0.5 pt, the same example gives the tag a weight of 0.8 pt.

4. What to consider in an architectural presentation workflow

For architecture and interior design teams, these tools make it easier to combine model views, dimensions, and 2D annotations on the same sheet with greater control. Showing different tags—such as walls, windows, doors, and furniture—with distinct line styles can help establish a readable line hierarchy across views. The documentation outlines a workflow in which views and tags are prepared in SketchUp, while line appearance in the viewport is adjusted in LayOut.

You can’t place a SketchUp viewport inside a scaled drawing group. To add a scaled drawing over a model, lock the viewport on a separate layer and create a new scaled drawing on the layer above it. The scale of imported CAD data can be changed to match the LayOut document, but you should check the current scale and group status when doing so.

Common mistakes

• Trying to apply a scale before grouping the geometry. Geometry must be inside a group for a scaled drawing.

• Selecting a new scale directly after applying the wrong one. Changing the scale after the initial application also changes the geometry’s size; use Remove Scale to reset it if needed.

• Assuming a dimension taken in an orthographic view is the actual length. An orthographic view gives the projected distance; a perspective view may show the actual distance.

• Forgetting to account for the viewport Line Scale multiplier when editing tag lines. Check both settings together to achieve the intended weight.

• Assuming line settings in a view will update automatically. If automatic rendering is off, click Render in the SketchUp Model panel to regenerate the view.