Restrain the degrees-of-freedom of selected nodes. Replace or remove
the support conditions previously defined.
From the Main
Menu select Model
> Boundaries > Supports.
Select Geometry
> Boundaries > Supports in the Menu tab of the Tree Menu.
Click to the right of Supports: Display the Support Table
Boundary Group Name
Select a Boundary Group in which the specified
boundary condition is included. Select "Default" if Group assignment
is unnecessary. Click to the right to prompt the "Define Boundary Group"
dialog box to add, modify or delete Boundary Groups.
Options
Add:
Add new restraints to selected nodes
Replace:
Replace previously defined restraints on selected nodes
Delete:
Delete previously defined restraints on selected nodes
Support Type
Select the components
of the degrees of freedom of the selected nodes to be restrained. The
components correspond to the GCS (Nodal local coordinate system if it
is defined) (refer to "Coordinate system and nodes").
D-ALL:
All displacement degrees-of-freedom
Dx:
Displacement degree-of-freedom in GCS X-direction
(Nodal local x-axis
direction)
Dy:
Displacement degree-of-freedom in GCS Y-direction
(Nodal local y-axis
direction)
Dz:
Displacement degree-of-freedom in GCS Z-direction
to the right of 
Boundary Group Name