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All the buttons in the left toolbar are available. They are
disabled because they are context sensitive. Context sensitive
buttons are buttons that are only enabled in certain conditions.
For example, the 
(Assign Bearing Plates) and 
(Assign Boundary Conditions) buttons will only be enabled after
one or more STM Nodes are selected from the active display
window. Another important example is the drawing and editing
tool buttons, such as the 
(Draw Inner D-Region Boundaries),
(Edit D-Region Boundaries),  (Draw STM
Elements), and 
(Drag STM Elements or Nodes) buttons.
They are only enabled after the Outer Boundary is created using
the  (Draw
Outer D-Region Boundary) button. The
button itself
will be disabled once the Outer Boundary is created.
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Q & A