In brief
- Dimensions in paper space show the size on the page; those in model space show the length in the SketchUp model.
- In a perspective view, a dimension may show the true distance; in an orthographic view, it measures the projected distance.
- A linear dimension shows the distance between two points, while an angular dimension indicates an angle.
- Stroke settings let you change line color, width, pattern, and end styles.
This guide explains how to add linear and angular dimensions to architectural sheets in SketchUp LayOut, check what the dimensions represent, and adjust line appearances. The official help pages referenced here were updated on 29 September 2026, but do not specify a particular LayOut version number. The steps are therefore limited to the tools and panel names described in the documentation.
1. Identify which space the dimension is in
Elements in a LayOut document that are outside the SketchUp model entity are in 2D paper space. A linear dimension added in this space shows the size on the page. A dimension inside the SketchUp model entity belongs to model space and reflects the length in the model. So an edge of the model that looks small on the page may have been measured in model space using its actual model length.
If the two ends of a dimension are in different spaces, the result is determined by paper space. For example, a dimension that starts inside the SketchUp model and ends at a text box in LayOut shows the distance on the page. Before adding a dimension, check where both points are to help avoid misinterpreting the value.
The view type also affects the result. In a perspective view, a dimension may show the true distance. In a standard orthographic view, it measures the projected distance on screen. The SketchUp Model panel can help you determine whether the view is orthographic. Don’t interpret a dimension value as the model’s actual length until you’ve verified the view type.
2. Add a linear dimension step by step
The Linear Dimension tool marks the distance between two points. It’s available from the Dimensions menu on the default toolbar or via Tools > Dimensions > Linear. Before you begin, choose the required appearance settings in the Dimension Style panel; new dimensions will use those settings.
Check Object Snap. If
Object Snap Onappears in the Arrange menu, snapping is enabled. According to the documentation, dimensions attached to objects update as the object changes only when Object Snap is on; it’s on by default. If it’s off, useObject Snap Offin the Arrange menu to turn the setting back on.Select the Linear Dimension tool. Identify the two points to measure, then click the start point followed by the end point. Make sure the points snap to the correct line or corner.
Position the dimension line. Move the cursor away from the line being measured to place the dimension line where you want it on the page. LayOut constrains the dimension to horizontal, vertical, or perpendicular to the two points you selected. Click to complete the placement.
Change the constraint if needed. When creating a dimension in an isometric view, you can use Alt on Windows or Option on macOS. To remove the constraint, hold Alt+Shift on Windows or Option+Shift on macOS while moving the cursor. Select
Isofrom the Standard Views submenu to switch to an isometric view.
When there isn’t enough room for the dimension, LayOut may move the text away from the line and connect it with a leader. This behavior is on by default; the leader style is managed in Dimension Styles. If you don’t want to use an automatic leader, select No Leader from the Leader Style menu in the Dimension Style dialog box.
3. Adjust angular dimensions and line styles
The Angular Dimension tool is available from the Dimensions menu on the default toolbar or via Tools > Dimensions > Angular. First, select a line or point representing one side of the angle. Move the cursor toward the vertex to set the first direction, then select a line or point on the other side of the angle. Set the vertex and the direction in which the dimension will be placed, then click to finish.
To change the line appearance of a dimension or another element, select the element and open the Stroke settings in the Shape Style panel. If the panel isn’t visible, use Window > Shape Style. You can adjust the color, width, dashed pattern, corner style, and line ends here. You can also add arrows or other end styles to the start and end points.
The table below summarizes the defaults and options specified in the documentation. Default values aren’t necessarily the only recommended choice for every sheet; they can be changed to suit line hierarchy and legibility needs.
| Setting | Default / options | Effect |
|---|---|---|
| Line width | Default: 0.5 point | Sets the Stroke thickness; you can enter a different value or select one from the drop-down menu. |
| Line pattern | Default: solid line | Selecting a pattern from the Dashes menu makes the line appear dashed. |
| Corner style | Default: Miter; Round and Bevel are also available | Changes the appearance of corners where lines meet. |
| End style | Default: Flat; Round and Square are also available | Sets the style of line or arc ends. |
| Dimension text position | Above, Center, or Below options | Positions the text box relative to the dimension line. |
To use the same appearance for multiple dimensions, choose the settings in the Dimension Style panel, then use the Eyedropper tool to apply the style to another dimension. The Style tool in the Shape Style panel samples an element’s fill and stroke settings and applies them to other elements; it shouldn’t be treated as having the same function as transferring dimension settings.
4. Final checks for an architectural sheet workflow
When arranging plans, sections, and elevations, first check whether the dimension endpoints are in model space or paper space. Then verify whether the model view is perspective or standard orthographic. These two checks help you determine whether a dimension may show the true distance or represent a projection. Finally, review the text position, line weight, and consistency of styles across the other dimensions.
Moving the entire dimension line and moving the connection points within a dimension can have different results. When the line is moved, the connection points and distances may be preserved. If a connection point is moved, it may detach from its original location; to attach it to a new point, it must snap to an inference. Angular dimensions don’t update automatically, even if they were initially snapped to an inference.
Common mistakes
Treating the page size in paper space as the same as the length in model space.
Assuming that a dimension in a perspective view always gives the true distance.
Assuming that a dimension remains attached to its original location after moving a connection point.
Expecting an angular dimension to update automatically when the model changes.
Confusing the roles of the Eyedropper and Style tools when transferring dimension styles.
For architecture, interior design, and visualization teams, a practical sequence is: check the space and view, create the dimension, then verify the style and connections. This makes it clearer what each dimension on the sheet represents. Since the help documentation doesn’t specify a particular software version number, the tool names are given here as they appear on the official pages.
Sources
3 sourcesSource texts are not republished; short quotes are marked, everything else is our own summary and commentary.
For architecture and interior design offices in Turkey, the practical value of this workflow is that it makes it easier to catch misinterpreted dimensions before sheet delivery. Making space and view checks a routine part of adding dimensions supports consistency, especially on sheets that combine different views.
The documentation doesn’t specify special hardware requirements or licensing terms, so it isn’t possible to draw conclusions about additional hardware investments. The points teams should pay closest attention to are the possibility of connection points detaching and the fact that angular dimensions don’t update automatically. It’s also good practice to verify the tool and panel names in the LayOut version being used.
Frequently asked questions
Why might dimensions in LayOut look different than expected?
The result depends on whether the dimension was created in paper space or SketchUp model space. A perspective view may show the true distance, while an orthographic view measures the projected distance.
How do you add a linear dimension in LayOut?
Select the Linear Dimension tool, click the start and end points, then position the dimension line. You can access the tool via `Tools > Dimensions > Linear`.
Where can you change the appearance of dimension lines in LayOut?
Edit the selected element’s Stroke settings in the Stroke section of the Shape Style panel. These settings include color, width, pattern, and end styles.
