Resize a Raster in Design
The tool described here will allow you to scale an inserted image so that the scale of the image matches the active drawing scale. This will allow you to trace the image using the Design tools, obtaining exact measurements where possible and very close estimates otherwise. To resize an image to match the drawing scale:
Click the Resize an Existing Raster Image to Active Drawing Scale icon in the Imaging Tab
From the drop‐down list that appears, select the raster name corresponding to the raster image you wish to scale
Enter a known length of a line on the raster (e.g. a property line) in the modifier box that appears. Use the longest known line on the raster for the greatest accuracy.
Click on each end of the line with the known length and the image will resize to the drawing scale.
Make sure your constraints are set to None.
Once step 4 is completed, verify the accuracy of the new image scale by using the Measure the Distance Between 2 Locations tool in the Edit toolbox and click on each end of the known line on the drawing.
Detailed instructions with screen captures can be found in the Design User Manual, section entitled Resizing an Image to the Drawing Scale.
Alternatively, you could view the “Tracing a Lot Plan” training video at around 3:30.