Hej Erik -
In this case, that means looking at something that is infinitively thin from the side.
Coming back to the original post in this thread…
When I create a dimension in the top view, and rotate the perspective view so that the dimension becomes “barely visible”, I can still select it. It’s when it’s “completely invisible” that it becomes impossible to select in that view.
Armin posted a link to a different thread on this topic. This behavior was changed in the Rhino 9 WIP and can be tested there. The developer was very much in doubt about changing this, and a different recent post probably shows that not everybody is going to like this change. It was changed in the WIP so that we can collect feedback…
[…] sometimes you accidentally move lines around without knowing.
from:
-wim