>(</span><span class='va'>data</span>, label_alpha <span class='op'>=</span> <span class='fl'>1</span>, <span class='va'>...</span><span class='op'>)</span>

<span class='fu'>label_family_obs</span><span class='op'>(</span><span class='va'>data</span>, label_family <span class='op'>=</span> <span class='st'>"sans"</span>, <span class='va'>...</span><span class='op'>)</span>

<span class='fu'>label_fontface_obs</span><span class='op'>(</span><span class='va'>data</span>, label_fontface <span class='op'>=</sp