Reply To: Alt+S to thicken the curved portion of the lid is acting differently in 2.90.1 than in video
The thing is, you have too much selected!
This is how it should be. Look at the white dots (selected, in your case: orange) and the black dots (unselected):
Now this happens when scaling (as it should):
But you must have Extruded, canceled (which doesn’t cancel the extrusion, only the ‘Move” that would normally follow the Extrude) and then selected ‘everything’ and extruded again:
Look at all the white dots (selected Faces). When Scaling now, this happens:
