Invisible beams in 3D View

[kimbryan.riel.archi]

Why aren't my beams not visible in 3D view> I know how it works in plans, about the view range thingy, but how is it so that in 3D, they do not appear? I tried checking out the hidden elements, visibility graphics, and all but I do not know why some beams do not show up. Though some, yes. Help me please, thank you so much!!

[ToanDN]

Set the view to Medium or Fine.

[kimbryan.riel.archi]

I'm always at fine. It's still not visible. Thank you, though.

[barthbradley · Accepted solution]

Switch to Structural Discipline. See 'em now? 

...here's a cheat sheet of 33 possibilities: 

https://www.revitforum.org/node/459