You can search for identifiers within the package.
in-package search v0.2.0
module Texture : sig ... end
module Window : sig ... end
val show_all : ?update_in_background:bool -> 'a Window.t list -> unit
val show : ?update_in_background:bool -> (string * Bimage.Image.any) list -> unit
Note: show should only be called on RGB and RGBA images, otherwise an `Invalid_argument` exception will be raised
show