Simpack - Post: How to change the size of a marker within a diagramm?

Hi, i am currently working with Simpack Post 2017 and would like to show the curves within a diagram not as lines (false) but as markers (). Unfortunately I cannot change the size of the markers above 9x9 (9x9), but I want the markers to be bigger. How do I change the marker size within Simpack Post? Can anyone help with this?

Thanks in advance for your help!