Minor Description
When you have spans of different font sizes in a TextPane, it looks to me like all the text is bottom-aligned, which generally looks bad. It would be much nicer if the baselines were aligned. Here's a deliberately exaggerated example:
<Window maximized="true" xmlns:bxml="http://pivot.apache.org/bxml"
xmlns="org.apache.pivot.wtk">
<TextPane>
<Document xmlns="org.apache.pivot.wtk.text">
<Paragraph backgroundColor="yellow">
<Span font="
">
<TextNode text="Label:" />
</Span>
<Span font="
">
<TextNode text=" some random text " />
</Span>
<Span font="
">
<TextNode text="(much smaller)" />
</Span>
</Paragraph>
</Document>
</TextPane>
</Window>