file: the name of the file to save, relative to the current
directory (defaults to "fgfs.sav").
+loadxml - load XML file into property tree
+ filename: the path & filename of the file to load
+ targetnode: the target node within the property tree where to store the XML
+ file's structure
+
+savexml - save property tree node to XML file
+ filename: the path & filename for the file to be saved
+ sourcenode: the source node within the property tree where the XML file's
+ structure is assembled from.
+
panel-load - (re)load the 2D instrument panel
path: the path of the XML panel file, relative to $FG_ROOT (defaults
to the value of /sim/panel/path if specified, or
<max>360</max>
</dial>
+textbox
+-------
+
+The text will be retrieved/buffered from/within a specified
+property tree, like:
+
+<textbox>
+ <!-- position -->
+ <x>100</x>
+ <y>100</y>
+
+ <!-- dimensions -->
+ <width>200</width>
+ <height>400</height>
+
+ <property>/gui/path-to-text-node/contents</property>
+
+ <slider>15</slider> <!--width for slider -->
+
+ <editable>true</editable> <!-- whether the puLargeInput is supposed to be editable -->
+</textbox>
__end__