--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/html_help/help/ug/gui_constructor_content.html	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,35 @@
+<p>
+  Since LTPDA is an object-oriented system, the user must create objects of different
+  types using the appropriate constructors. The various constructor forms for each 
+  different LTPDA class can be explored using the <it>constructor helper</it>.
+</p>
+<p>
+  To start the constructor helper GUI:
+</p>
+<div class="fragment"><pre>
+    >> ltpda_constructor_helper
+</pre></div>
+<p>
+  or click the appropriate button on the Launch Bay.
+</p>
+<p>
+  You should then be presented with the following figure:
+</p>
+<br>
+<img src="images/constructor_helper.png" alt="LTPDA Constructor Helper" border="3">
+<br>
+<br>
+<p>
+  Selecting a class from the drop-down list reveals the possible parameter sets for that 
+  class constructor. Selecting a parameter set reveals the default parameter list constructor
+  string for constructing that class object in this way. For example, if we want to construct
+  and Analysis Object using the time-series constructor, select the AO class then click on 
+  "From Time-series Function". You should then see:
+</p>
+<br>
+<img src="images/constructor_helper_eg1.png" alt="LTPDA Constructor Helper" border="3">
+<br>
+<br>
+<p>
+  You can then edit the parameter list and build the object by clicking on <tt>Build</tt>. 
+</p>