Stop Solids turning Red

In the Model-Editor, Solids become red as you mouse-over them (default colour in Application-Settings > Graphics tab)

To stop this, filter for an element that is not in the Model-Editor. E.g. Filter for Points. Points are not in the Model-Editor, and thus Solids do not become red as you mouse-over them.

See Filters menu (Filters toolbar) > Filter Points.