Trimming specific shape refer to other layer shape

Hi

I believe Shape > Edit Boundary should work for this. Invoke that command then click on the 12v shape at the top of the cut line in your picture and draw downwards, click the bottom of the cut and everything to the right of your cut line will be removed.

thank you, I think it would work only simple shape like having straigh lines, but it would be hard to apply on complex shape like elipse or circle shapes

If it is a dynamic shape, you could create a cline line seg with the appropriate clearance (DRC).  Then make the shape static and delete the cline seg.

If you need the shape to be dynamic, I would create a anti ecth before updating the dynamic shape.

I do it with Select Shape/Manual Void and create a void in the Yellow shape around the trace on the other layer.

And when working with shapes (editing), you can change the active layer once the shape is selected and change it an Etch Layer in case you have smaller grid spacings on the Etch layers.