Make easier to stack tiles - notch up the grid

What Feature would you like to see included within TaleSpire?
What does it look like, how does it work, how is it used. Paint us a figurative picture.
At the minute, stacking tiles is really time consuming and not easy. I don’t believe you can progressively notch up the placement grid with the keyboard, so can’t simply copy and paste to make multilayer structures.

Having a keyboard shortcut to notch up the grid, by one tiles worth, would allow a much easier way to stack and place items in relation to other items heights. 

What situations would this Feature be useful?
Creating high walls, multistory buildings, build stairs easier