Created parts (except clips through model parts) do not have node or element labels.
Note: The font size of the node and element labels can be modified under Edit → Preferences → Annotation. Simply change the value in the 3D label size field and hit a return. If desired, this change can be made permanent for future EnSight sessions by hitting the button.
Another useful technique for reducing label clutter is to use the front and back Z clipping planes to display only a thin slice of interest. See Set Z Clipping for more information.