There's a strange level of redundancy in the controls for Lunar: Silver Star Story Complete.
The L2 and R2 buttons turn on and off controller vibration and spell name display, neither of which is something one needs quick access to. The circle button opens the save menu directly (leading to a significant delay, since the PS1 is not quick to read its memory cards). Both the square and select buttons open the main menu, from which one can access any of these other options.