Its is always nice to print out a bit of a 3d image in a plan set of the grading works to communicate to everyone what things will look like. Typically jobs do not have the budget to do the full Monty so I just adjust the view port setting to give a basic image as shown below.
To get the shading to shown up in layout tab you have to select the viewport and make sure the Visual Style and Shade plot are set to some thing like Shaded and Conceptual in the properties window.
If not you have to open the Visual Styles Manager then select the viewport and while having the viewport selected double check the visual style you want to be applied to the view port.