Change line color of a wall in revit 2019

[nicolas]

Hi,  

I need some help in changing the line/edge colour of a 200mm. wall in revit.  I want the line to appear red in contrast to other wall line colout to emphasize its size.  I have been able to change the hatching to red but I am currently unable to change the link thickness.  it seemed much easier in other newer version but 2019 it is almost impossible from my point of view.  

 

 

Thanks in advance for your help.