I use Photoshop to color architectural drawings, exported from AutoCAD as PDF-files. I usually choose the 'open as smart object' with the crop-to-media setting to import the drawing in the correct scale.
Lately, when i do this, Photoshop opens the smartobject scaled and distorted in the wrong canvas-size, which poses a huge problem for the drawing-scale if not discovered before the graphic work has been executed.
Hi, Before going the preference route, can you try opening the PDF (not using "...as Smart Object") so you get the Image Size options. Then make sure they are the dimensions and proportions you expect, before opening. Does that look right? Close the document without saving, and try opening again as Smart Object.