When using Linear Draft, you are able to switch between views (e.g. 2D plan/layout & 3D) by using the buttons located on the Linear Draft toolbar.
Whilst using these view functionalities, there are times when you may want to see another view without having to leave the current display that you have on screen.
Using the 'View All Levels' function will allow you to do this.
Select the 'View All Levels' button from the Linear Draft toolbar. This will immediately turn on all levels (2D and 3D) that are prescribed within the project settings and be displayed within the current view.