public abstract static class HTMLDocPlus.Embed
Manage a user input object embedded in a document.
An embedded user interface object appears in the document source as
<img id="for ref by code" embed="swing class" aligny=".7">
where the swing class is one of JLabel, JText, etc.
aligny moves the embedded object upwards w.r.t. the baseline.
However, it there are multiple embeds on a line, a disparity in aligny
can move the one with the lesser align to well below the baseline.
For a JLabel and a JButton in text, I had success
with .9 for the JLabel and .7 for the JButton. Because the button was
quite a bit taller than the label and both were taller than the text.
in html: <img id="topbutton" embed="JButton"/>
the JButton can be further tailored by fetching it with
JButton but = buttonVariable.getComponent();