Model and detail elements that are obscured by other elements can be displayed using the Show Hidden Lines tool. You can use the Show Hidden Lines tool on all elements that have the Hidden Lines subcategory. The Remove Hidden Lines tool is the inverse of the Show Hidden Lines tool.
To show hidden lines
For example, select a filled region that is overlapping a wall.
The lines of this element display in a hidden line style through the overlapping element. To change the hidden line style of the element, use the Object Styles tool.