Hi new to Sketchup and have no idea how to revert to the model once I have created a section. Have no problems creating any section and manipulating them, but just can’t figure out how to return to the original model. Probably one click…please help. Thanks!!! 
To begin with,
You can right click on the section and Untick Active Cut.
Or use the View menu to turn on and off both the section cut and the section plane.
Thanks very much for your assistance! Right clicking it is 