Why there's no content in the drawing or it's a mess?

If there are some problems with the display of contents, it might be the following situations:

• Contents in the drawings are disordered or incomplete.
• Solution: Click toolbar on the bottom to switch from model to layout, for some contents are designed in the part of layout.
• The drawing is incomplete and lack of walls and axes, it doesn't help by switching to layouts.
• Reason: Usually this is due to the existence of external reference which doesn't belong to a part of the drawing but is necessarily needed for the display of contents.
• Solution: send external reference files to your phone and CAD reader will identify it automatically