Ctrl+T Explanation: There is no keyboard shortcut that specifically provides scaling and manipulation options for an embedded smart object which does not fit the canvas. However, the general keyboard shortcut for scaling an object is Shift+Ctrl+Alt+S (Windows) or Shift+Command+Option+S (Mac OS), and the general keyboard shortcut for manipulating an object is Shift+Ctrl+M (Windows) or Shift+Command+M (Mac OS).