Added some documentation to memcpy16_tile8_with_palette_offset()

include/graphic_utils.h

@@ -122,7 +122,11 @@ void update_text_rect_to_right_align_num(Rect* rect, int num, int overflow_direc
 
 /*Copies 16 bit data from src to dst, applying a palette offset to the data.
  * This is intended solely for use with tile8/8bpp data for dst and src.
+ * The palette offset allows the tiles to use a different location in the palette
+ * memory
+ * This is useful because  grit always loads the palette to the beginning of 
+ * pal_bg_mem[]
  */
 void memcpy16_tile8_with_palette_offset(void* dst, const void* src, uint hwcount, u8 palette_offset);
 
-#endif //GRAPHIC_UTILS_H
+#endif //GRAPHIC_UTILS_H