#define MIN_HIST_WIDTH 4
#define MAX_HIST_WIDTH 10
-enum PEN { PEN_NONE, PEN_BLACK, PEN_DOTTED, PEN_BLUEDOTTED, PEN_BOLDWHITE, PEN_BOLDBLACK };
+enum PEN { PEN_NONE, PEN_BLACK, PEN_DOTTED, PEN_BLUEDOTTED, PEN_BOLDWHITE, PEN_BOLDBLACK, PEN_BACKGD };
#define FILLED 1
#define OPEN 0