Centremark size when drafting

[T.Hannibal]

Hi All,
I'm a bit of a noob with CATIA drafting, and am
having a bit of trouble with the size of curve
centremarks that it uses.

I'm using an ISO standard, and the perpendicular lines
which the centremark consists of extend right to the full
diameter of the curve which it is marking. This is fine
for small radii and drilled holes - however when I'm
dimensioning a large curved surfaces, the centremark
lines are extending right across the drawing into other
views and causing all kinds of confusion in the drawing.

- How can I limit the size of the centremark lines?

Thanks in advance, Thomas

[Using V5R20]