tool-bar-add-item-from-menu

tool-bar-add-item-from-menu is an autoloaded compiled Lisp function in `tool-bar.el'.

(tool-bar-add-item-from-menu COMMAND ICON &optional MAP &rest PROPS)

Define tool bar binding for COMMAND in keymap MAP using the given ICON.
This makes a binding for COMMAND in `tool-bar-map', copying its
binding from the menu bar in MAP (which defaults to `global-map'), but
modifies the binding by adding an image specification for ICON. It
finds ICON just like `tool-bar-add-item'. PROPS are additional
properties to add to the binding.

MAP must contain appropriate binding for `[menu-bar]' which holds a keymap.

Use this function only to make bindings in the global value of `tool-bar-map'.
To define items in any other map, use `tool-bar-local-item-from-menu'.