\hyperlink{frame-to-jump-to_label}{\beamerskipbutton{text_on_the_button}}

- creating a button with a hyperlink to the frame labeled with
  frame-to-jump-to_label
- the button has a doublearrow to the right

\hyperlink{frame-to-jump-to_label}{\beamerreturnbutton{text_on_the_button}}

- creating a button with a hyperlink to the frame labeled with
  frame-to-jump-to_label
- the button has an arrow to the left


\hfill\hyperlink{label_to_jump_tu}{\beamerskipbutton{text_on_the_button}}
\hfill\hyperlink{label_to_jump_tu}{\beamerreturnbutton{text_on_the_button}}

- \hfill moves the button as far to the right as possible

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general procedure for creating a hyperlinked button:

1. You specify a target using the command \hypertarget or (easier) 
the command \label. In some cases, see below, this step may be skipped.

2. You render the button using \beamerbutton or a similar command. 
This will render the button, but clicking it will not yet have any effect.

3. You put the button inside a \hyperlink command. Now clicking it will jump 
to the target of the link.