Again, thanks a lot for your time @PeterFotiadis
At this point i really hope if somewhere there’s a plug-in (or native) which features and intergrates all these view relatived matter (clipping plans, capture, hide, display, preview, viewport - like Human’s “Place on Screen” …etc.).
These dyas I somewhat rewrote a Python Script for capture with rectangle in view (I admit no time to learn C# … )
Then, I went and tried the CP thing myself. Soon the obstacles appeared - enable, flip, viewportID, delete, hide, multiple planes as list or tree…) …