You can adjust color, line thickness, and other aspects of the add-on by going to Edit -> Preferences -> Add-ons and expanding the Perspective Plotter entry.
This will change the colors and transparency of the different perspective axes.
Change the thickness of the Axis lines and control points.
Change the color and transparency of the horizon line.
Change the thickness of the horizon line.
Change the color and transparency of the grid point.
Change the diameter of the grid point.
Change the color and transparency of the principal point.
Change the diameter of the principal point.
Change the color and transparency of the measurement line.
Change the thickness of the measurement line.
This configures the :ref:`Move Along View` tool.
You can change the keyboard shortcut for this tool by clicking on the parameter and pressing a new key combination.
Change the color of the lines projected by the tool.
Change the thickness of the lines projected by the tool.
You can display X/Y/Z axis lines when moving a vertex or object if it aids placement.
These parameters change how close the mouse needs to be to a control point.
How close to the Axis Point the mouse needs to be.
How close to the Grid Point the mouse needs to be.
How close to the Principal Point the mouse needs to be.
How close to the Measuring Point the mouse needs to be.