wait – i had this before on a different machine. there is an advanced setting for the size of them… somewhere
edit: no it was a diffent problem: there where too small – this time there are entirely missing
hey thanks for the help yesterday – the pc I tried to run Rhino was a macbook air from 2011 with bootcamp/win7. maybe a little optimistic - In the end I switched pc to “solve” the problem – It was just a quick test to use Grasshopper as a control-interface for a franka emika panda 7-dof robotik arm.