impossible to see all the outline lines

[Biggmetals]

Good morning, at work I'm preparing presentation tables for customers but I have a problem.
As a rule, for completeness, in the card that I have to insert at least 2 orthogonal views and an isometric view.
Usually every time I create the isometric solidwork view hides me most of the lines automatically and I holding alt and selecting all the design with the mouse, I make "reappear" all the lines hidden by solidwork.

the problem is only one, on certain solids there is no way to make the lines appear in their completeness and I don't know why it does it only on particular lines and arches (which punctually I have to "recalcate" to make them appear as I do not find another way)
Did any of you have my own problem? If so, is there a way to solve it altogether?

allego screen

 

[MassiVonWeizen]

Isn't that the lines you see op you don't see are the tangent lines? and manage with the menu display> view tangent edges. . .

 

[Biggmetals]

Isn't that the lines you see op you don't see are the tangent lines? and manage with the menu display> view tangent edges. . .

solved, thanks massive!