Are you sure those are Arcs and not Splines? I am not aware that Arcs would have such handles.
If they are splines, you can toggle the display of those handles by the View\On-Screen View Options\Spline Handles menu command.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27
