LW>B: "Auto-Size" for image mapping -- equivalent in Blender?

I recently asked an aspect ratio question, illustrated here:

But that reminded me of an Lightwave 3D feature I haven’t yet come across in Blender: “Auto-Size”. Is there such a thing? Because it was incredibly useful in Lightwave.

Use the generated texture coordinate it’s the same as automatic sizing in LW.

??? What is that?