When the Hex button is dragged up, much like you would either when opening the series listing or when removing concepts, a new ‘play’ target gets revealed under where the hex started.

Dropping the hex back on the play symbol will begin animating steps through the current series. The time spent visiting each idea will vary, by an estimate of the time needed to read it (and maybe surrounding thoughts).

Autoplay Shared Series

Tap the ‘Share’ button in the context pane while viewing a series. You’ll see a dialog with an option to copy a link to the current series. When copying this link, you have the option to have playback begin when people visit that link.