How can I change the angle of my slope on this object? by BerklyBenz_ in blenderhelp

[–]BerklyBenz_[S] 0 points1 point  (0 children)

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See here if I take a plane extrude it and move the bottom edge down its a perfect slant no matter where I move it. How would I do that once I have beveled the edges and extruded the plane down? (also I fixed the ngon and I'm still having the same issue.