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To impose the x-displacement constraint at the left, bottom corner, highlight Static Structural in the tree and use Supports > Displacement as shown in the figure below. Select Also, click on the "vertex selection filter" and then click on select the vertex that you need to constrain.
![](/download/attachments/189860426/displ_constraint.png?version=1&modificationDate=1383413669000&api=v2)
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