FXpages
Fx Pages are pages located in the gfx folder of Re-volt. These contain pick-ups, lightnings, shockwave, signs, speedometer settings, and other stuff.
All the things that are represented here are mainly power-ups, however, there are also textures for the rocket, the signs and the pick-up selection screen. (very useful when using SADIST)
Editing
You can edit/"Mod" the FXPages in external editors, like Photoshop,paint.net or simply using Paint.
Below there are some examples:
Trivia
In Dreamcast, the directional arrows had a different design, as shown below: