Use a combination of the above alignment controls to get your Overlay positioned just right. Rotate the overlaid drawing in 90 degree intervals by selecting the right Rotation option.Increase or Decrease the size of the overlaid drawing using the Scale field.Change the Position values to shift the drawing left/right (X field) or up/down (Y field).To shift the overlaid drawing to better align with your primary drawing: The annotations on the primary (red) drawing will show up in shades of Red and the annotations in the overlaid drawing (blue) will show up in shades of Blue.Under each drawing, turn the Annotations toggle to On.To view the annotations on each drawing in the Overlay: To go one step further and see exactly what has changed and nothing else, use the Difference mode toggle at the bottom to show only what is different between the drawings.
To help you through each of these scenarios (and many more) Drawboard Projects' new Overlays tool is incredibly useful. Not quite sure what has changed on the latest set of issued drawings? Need to check that your markups have actually been addressed in the latest version? Need to compare one floor plan with the floor below?