I have a lot of small lines. When I zoom a lot, point and line have the same size. When I start unzooming, they keep having the same size, then after a certain zoom level, line become thiner and at a certain point we can barely see them and the smallest one are even not visible anymore. On the other side, point have the same visual aspect at every zoom.
What can I do to know there is a line when looking from a far zoom level ? I should at least see something like a dot, when looking at very far zoom level, no ?