Eldoc displays the function signature of the closest function call around point either in the minibuffer or in the modeline. This package modifies Eldoc to display this documentation inline using a buffer text overlay. `eldoc-overlay-mode' is a per-buffer local minor mode. By default, the overlay is not used in the minibuffer, eldoc is shown in the modeline in this case. Set the option `eldoc-overlay-enable-in-minibuffer' non-nil if you want to enable overlay use in the minibuffer. Finally, see the documentation for `eldoc-overlay-backend' if you want to try a different overlay display package backend.