Thank you so much tristan, very clear explanation.
but what can depend on the fact that it is not between 3d views to choose any view among the new ones I created? gives me as the only 3d view available this: {3d}, which then is the default assonometric view of revit. I then created some others, rename them, so I no longer have a view with a similar name, and if I try to rename one in this way, revit tells me that I can not use certain symbols (including p. graffa). Anyway, do you think it depends on this? How could I solve this?
in the file I created various 3d views to frame the different objects present in the file. Having regard to a 3d view, within graphic substitution > revit links > object name imported from host view > connected view: At this point I don't even find one of the 3d views I have previously created.
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