See Figure 'B' below.
Having said that enter . . . . . the override. . . . .
Now, the 'Hidden Lines' sub-category is different.
It is used to display edges of elements that have been told to show as 'Hidden' when behind a particular element. See Figure 'D' below.
Use the 'Show Hidden Lines' tool from of the View tab of the ribbon.
Pick the object to do the 'hidding' then pick the object to 'show as hidden'. The hidden lines then take on the appearance of the line style and weight specified in the sub-category 'Hidden Lines'. This tool can also be used with a combination of both model and detail objects in plan, elevation, section and 3D views !
In the image above the wall was told to be hidden by the floor
and the floor was told to be hidden by the wall.
Gotta run . . . .. . . .