I can find the menu easily, however I do not get the dropdown to change the
size. Are there conditions under which selection is not available?
So, you get all the line format menu dropdowns except the Begin size
and End size?
There are no options that control that sort of thing. Maybe someone
with knowledge of Visio's internals can help ...
All I can imagine is:
a. Line ends are controlled by a dll that is missing, if that were the
case then line end sizes would not be the only missing items.
b. A custom line end is causing an internal problem. I can't believe
that would prevent the internal line end types to fail.