I am sure there are many more, but these are the ones I use frequently.

  1. Alt + Drag to toggle snap-on off and move objects freely
  1. Up/Down arrows to move objects in small steps & SHIFT+ Arrow to move them large steps
  1. Ctrl + Shift + Arrow to make shapes bigger/smaller
  1. Shift + Resize to keep the aspect ratio
  1. Ctrl + G to group and Ctrl + Shift + G to ungroup. Align, Distribute and Group and then resize to scale all the shapes/cards at the same time
  1. Ctrl + Arrow to quickly cycle through visuals/shapes on the canvas