little red and green r

sorry if i have put this in the wrong place but my question is i have r4 cards and wanted to know what the little red r is for when you press the back right button it turns green thanx in advance.

It allows you to soft reset to the R4 menu. I believe the button combo is L+R+Select+Start

this does not belong in site support, read the board descriptions people.

Wrong. It's L+R+A+B+X+Y.