Why does the corner of my model dissappear when I rotate it?

SketchUp
1

When I rotate my house model a whole corner section is cut out and disappears. It usually happens if I make a slight alteration to the drawing.

2

Search the forum and the help site for ‘clipping’. If you are using parallel projection, switch to perspective and then zoom extents.

3

That’s done the trick.

Thank you

Regards

Steve