In Cura there are different ways of viewing the model on the build plate. You will find these different views by clicking the “View mode” button in the top right corner.
This is the default view mode and it will basically show the model in the way it was designed, which means that you can see the shape and size of the model.
If you have a model with parts floating in the air or slanting parts it can be handy to use the Overhang view mode. Cura will show the overhanging parts in red, so that you can easily see if support is needed. The overhanging parts that are shown here are based on the “Overhang angle for support” in the Expert settings, which is set to an angle of 60 degrees by default.
If you want to look through the model you can use the Transparent view. You can use this view mode if you have a model with internal structures.
The X-ray view helps you to identify if there are gaps or intersections in the model (which could happen if the model is not designed properly). Red areas tell you that these parts will potentially cause problems while printing.
One of the often used view modes is the Layers view. Here you can exactly see how the model is going to be printed by scrolling through the layers. It’s advised to use this view mode before printing the model because you can easily see if there are faults in the model/print or not.