Hello,
I was wondering if it was possible to remove the “Set Smooth” feature without doing Ctrl+Z. I was following along a tutorial, and I want to know undo the feature to see my model in LPM. I’ve saved an I’ve been working on it for a while, so I don’t believe it’d be possible for me to use “Ctrl+Z”. 
Any help would be appreciated.
Thanks guys!
Yes . In the Links and Materials panel in the Editing (F9) context of the Buttons window, at the bottom of the Links and Materials panel are the 2 options Set Smooth/ Set Solid . Hit which ever you want the display type to be …You also get the options by hitting the W specials menu … they show up as options there as well .
When you Set Smooth/ Set Solid you are not adding geometrical data or even materials data but how the normals are to be displayed/rendered …
Although it doesn’t sound like it, the “Set Solid” button next to the “Set Smooth” button undoes its effects.
Thanks Orinoco!
I was debating on whether or not I should press “Set Solid” just to see what would happen… because there was no… “Re-set” anywhere where I could see…
any how… thanks again.
For hot keys, you could press:
W > Alt + 3 for set smooth
or
W > Alt + 4 for set solid
You must be in edit mode with components selected (vertices/edges/faces).
I use them often 
without looking at me keyboard mwuahaha