How to set the displacement bounds?

RMB on the geometry node
Select Edit Parameter Interface
choose the For Rendering TAB (on the left)
at the bottom in the filter type ‘disp’ hit enter
dive into Mantra 9.5 > Shading
Select Displacement Bound
hit the right facing arrow in the center
hit Accept

you'll now see the Displacement Bound parameter on the Render > Shading tab of the parameter pane for that object

Thank you very much