Hey there I'm new to blender and am simply trying to grab a face on my object and move it down, thus lowering the rest of the objects faces as well, its hard to explain but here are a couple pictures, before:
so why is it just making a new edge half way down the cube instead of shrinking said cube? I'm selecting the top face, grabbing and moving it down the Z axis to produce this result. Dont know if it matters but also this cube is a duplicate of the one behind it with no addons/modifiers.