How to delete "elements" from complex profile

Hello,

I want to edit my complex profile. Say there are all tangents with certain grades eg: 0.50%, 1.5%, 4.0%, -2.0% in continuation.

I created these by "line between points" tool, made a complex profile out of it, assigned a name and a feature definition.

Now, I want to make a change. I want to delete the 1.5% grade tangent and continue the 0.50% to 4.0% and then insert a curve.

What is the usual way to achieve this in OpenRoads (PowerGeopak SS4)?