To scale and adjust a project in FreeCAD using a photo and a tape measure, you import the image, use the Calibrate tool to scale it based on a known measurement, and then trace or dimension your sketch over it.Step 1: Prepare the Image and MeasurementsFor the best results, ensure your photo was taken looking perfectly straight-on (orthographically) and include a known object (like a ruler or a measured tape) within the frame.Step 2: Import and Place the PhotoOpen FreeCAD and click File > Import to select your image.A dialogue will ask you to choose a plane (e.g., XY plane) to place the image flat against the background.The image should now be visible in your 3D view and listed in the Model Tree.Step 3: Calibrate the Image to Real ScaleDouble-click the image name in the Model Tree to open its property settings.In the Task panel, click the Calibrate button.Click two distinct points on the image that correspond to a known distance you measured with your tape measure (e.g., the edge of an object, or two tick marks on a ruler).A dialogue box will pop up. Enter the actual measurement in millimeters (e.g., if you measured 10 cm, type 100 mm) and press Enter.. The image will instantly resize to the correct physical proportions.Optional: Set an image transparency (in the settings menu) so you can easily see your sketches over the image.Step 4: Trace and ModelSwitch to the Part Design Workbench, and create a new Body and Sketch.Choose the plane matching your image.Use the sketching tools (Circle, Polyline, Rectangle) to trace the features directly over the scaled image.Use the Dimension Tool (hotkey D) to constrain your sketches to exact measurements.