How do I align the scale of my drawing to the scale in my plan, image, or PDF?

You can align your drawing's scale to a reference on an imported plan, image, or PDF using the Measure tool.

Import your plan onto the canvas. You must know one real-world measurement for a specific part of the plan (e.g., the length of a wall is 12 feet).
Open the Precision menu and activate Measure.
Activate the Line Guide. Align the guide's handles to the section of your plan that corresponds to your known measurement.
Tap the scale ratio that appears next to the Measure button on the canvas.
In the menu that appears, do not change the first field. In the second field, enter your known measurement (e.g., 12 feet).
Dismiss the menu. The scale for your entire drawing is now set and will apply to all tools and measurements.

For visual guides, see our illustrated tutorials on scale and measurement or creating a floor plan.. You can also watch our video on Setting Scale and Scale and Measurement Basics.