bel_fill_sig</span><span class='op'>(</span><span class='va'>data</span>, label_fill <span class='op'>=</span> <span class='st'>"white"</span>, <span class='va'>...</span><span class='op'>)</span>

<span class='fu'>label_size_sig</span><span class='op'>(</span><span class='va'>data</span>, label_size <span class='op'>=</span> <span class='fl'>4</span>, <span class='va'>...</span><span class='op'>)</span>

<span class='fu'>label_alpha_sig</span><span class='op'>(</span><span class='va'>data</span>, label_alp