Camera Clipping Plane is a necessary display optimization where the computer only draws things that might be visible to the viewer, thereby reducing the rendering load and greatly speeding up the application.
Modeling technique can help manage camera clipping.
Given it’s an integral part of OpenGL rending, there’s no way to shut it off.
The R,G,B Drawing Axes are adjustable. They can be placed and oriented any way you wish.
By default, the adjustable Drawing Axes are coincident with the inalterable World Axes of SketchUp’s 3-axis Cartesian coordinate system.
Repositioning the Drawing Axes doesn’t change the distance between the model and the World Axes Origin
To return the Drawing Axes to their default position, aligned with the World Axes:
• Right context click in empty space near one of the Drawing Axes > Reset
See this section of the SketchUp Sage site:
Clipping Plane — SketchUp Sage
https://sites.google.com/site/sketchupsage/problems/other#TOC-Is-all-or-part-of-the-model-disappearing-