You can search for identifiers within the package.
in-package search v0.2.0
exception Graphic_failure of string
val open_pdf : string -> unit
val open_pdf_channel : Stdlib.out_channel -> unit
val open_graph : string -> unit
val close_graph : unit -> unit
val clear_graph : unit -> unit
val set_window_title : string -> unit
val size_x : unit -> int
val size_y : unit -> int
type color = int
val rgb : int -> int -> int -> color
val set_color : color -> unit
val background : color
val foreground : color
val black : color
val white : color
val red : color
val green : color
val blue : color
val yellow : color
val cyan : color
val magenta : color
val plot : int -> int -> unit
val plots : (int * int) array -> unit
val moveto : int -> int -> unit
val rmoveto : int -> int -> unit
val current_x : unit -> int
val current_y : unit -> int
val current_point : unit -> int * int
val lineto : int -> int -> unit
val rlineto : int -> int -> unit
val curveto : (int * int) -> (int * int) -> (int * int) -> unit
val draw_rect : int -> int -> int -> int -> unit
val draw_poly_line : (int * int) array -> unit
val draw_poly : (int * int) array -> unit
val draw_segments : (int * int * int * int) array -> unit
val draw_arc : int -> int -> int -> int -> int -> int -> unit
val draw_ellipse : int -> int -> int -> int -> unit
val draw_circle : int -> int -> int -> unit
val set_line_width : int -> unit
val draw_char : char -> unit
val draw_string : string -> unit
val set_font : string -> unit
val set_text_size : int -> unit
val text_size : string -> int * int
val fill_rect : int -> int -> int -> int -> unit
val fill_poly : (int * int) array -> unit
val fill_arc : int -> int -> int -> int -> int -> int -> unit
val fill_ellipse : int -> int -> int -> int -> unit
val fill_circle : int -> int -> int -> unit
type image
val transp : color