How to control the size of control points in ROI

I need to change the control points size in ROI


Where and How can I control this size

You cannot modify Annotation ROI control point sizes. However, in recent Slicer Preview Releases you can create markups ROIs and use that for cropping volumes. Markups ROIs have adjustable control points size and other advantages (e.g., they can be rotated).

Control point sizes can be modified in ROI markups, which replaced ROI annotations.