Is it possible that a parent go down from it's child in feature manager ?
so do this ..
open a sketch in front plane and in this time copy a new plane from top with ctrl+drag method.
now sketch a line and use the collinear relation between the line and new plane ..
close the sketch ..
Now you will see the plane1 (new plane) is under the sketch1 , but it is the parent of sketch !!!
so do this ..
open a sketch in front plane and in this time copy a new plane from top with ctrl+drag method.
now sketch a line and use the collinear relation between the line and new plane ..
close the sketch ..
Now you will see the plane1 (new plane) is under the sketch1 , but it is the parent of sketch !!!