A regenerative braking coordination device has a braking operating member receiving an input from a driver in the form of an operation amount, an input shaft operable for transmitting the operation amount, and a braking force boosting device operable to generate a hydraulic braking pressure corresponding to the operation amount transmitted by the input shaft. One embodiment is for use with a surface planer board line; another embodiment is for use with an underwater depth controlled downrigger-trolling cable and weight system. In accordance with one embodiment of the invention, the diffusion layer includes a substrate that is coated with a microporous layer. The cavity is adjustable, whereby the cavity is adjusted to improve charging of the toner particles. The light shielding layer 14 improves roughness on a surface of the display layer and the adhesive layer filled up the roughness.