Is it possible to apply any formatting when calling "<!-- System:Last10Items -->"?
I'm hoping to left justify and make smaller the resulting list. Also, it doesn't seem to be creating its own Menu heading on my page (I had to add one). Am I perhaps doing something wrong here?
You're not doing anything wrong. In the end you'll probably have something like this aside from any custom formatting you are doing to change the base look and feel of your menus.
<table border=0 class="Menu" cellpadding="1" cellspacing="0" width="167">
<tr>
<td class="MenuCat" align="center">Last 10 Items</td>
</tr>
<!-- Menu:StartItemList -->
<tr>
<td class="MenuChoice" align="left">
<!-- Menu:StartItem -->
<!-- System:Last10Items -->
<!-- Menu:EndItem -->
</tr>
</table>