UI-O-Matic has a config file (\App_Plugins\UIOMatic\UIOMatic.config) where you can set the following options:
<?xml version="1.0" encoding="utf-8" ?><UIOMatic defaultObjectServiceType="UIOMatic.Services.PetaPocoObjectService, UIOMatic"><setting key="defaultListViewPageSize">10</setting><setting key="rteFieldEditorButtons"><![CDATA[["preview", "|", "undo", "redo", "|", "copy", "cut", "paste", "|", "bold", "italic", "|", "link", "unlink"]]]></setting></UIOMatic>
Ability to switch out the default object service type, read more on this in the advanced section.
Default page size for the List View, on installation this is set to 10
In this setting you can specify which buttons should be available on the RTE field editor