The Shape Nodes palette has shapes like trapezoidal, parallellogram, triangle, etc.
It is a tempting to customize their appearance:
Change the aspect ratio of a triangle (= Height / Base)
Tilt the traingle
Change the angle of the parallellogram/trapezoid
Change the angular sides of the octagon.
See the sample customizations given below (created in LibreOffice)
Can this be possible in yEd Editor?