Prompt Title: KiCAD Edge Cut Alignment.

To make the edge cuts line up exactly with the lines in KiCAD, you can follow these tips:

1. Ensure that the grid is set to the appropriate value: In the PCB editor, go to View -> Grid and select the grid size that matches the dimensions of the PCB traces.

2. Snap to Grid: In the PCB editor, enable "Snap to Grid" under the View menu. This will ensure that your edge cuts are snapped to the grid and aligned with your traces.

3. Use the "Align Edge" tool: This tool can be found under the "Edge.Cuts" layer. Select the edge you want to align, and then select the "Align Edge" tool. This will align the edge with the nearest grid point.

4. Check for DRC Errors: After aligning the edge cuts, run the Design Rule Check (DRC) to ensure that there are no errors in your design. The DRC can help you identify any areas where the edge cuts may not be aligned with your traces.

By following these tips, you should be able to ensure that your edge cuts are aligned with your traces in KiCAD.