bel placement relative to
<code>x,y</code> coordinate.</p>
<p>If both <code>preset="default"</code> and <code>adjPreset="default"</code> the original
<code>adjX,adjY</code> values are returned.</p>
<p>The function is vectorized, and uses the longest input argument,
so one can supply a vector of <code>preset</code> and it will return coordinates
and adjustments of length equal to the input <code>preset</code> vector.
The <code>preset</code> value takes priority over the supplied <code>x,y</code> coordinates.