Raising a blueprints height?

Hi guys and gals!

I've made a blueprint for a ground floor. I'm trying to add this blueprint on top of the existing blocks to make a 1st floor.

Is there any special key-press I can use to raise it up? It seems to want to just place the new blocks directly on the old blocks?

Hi Minotorious - yeah I had tried that but it doesn't seem to work.

Tried + - keys, tried using ctrl with the page up page down, ctrl and + - keys, tried all sorts of "normal" combinations but it doesn't seem to work

Ahh I think I have worked it out!

. . .

This was strange. On the placement settings, Up and Down were mapped to PgUp and PgDn, I clicked on Up/Down options respectively and clicked on the physical PgUp PgDn keys on my keyboard but instead of staying the same as I expected they came up as KEY_PRIOR and KEY_NEXT (as show on the right screengrab). I saved this and went back into the game -this still didn't work?! I then went back into settings and remapped them to the Home and End keys (show on left screengrab). . . now this did work!

I suspect this may be some kind of bug relating to a keystroke listener and differences in keyboard designs.

For informational purposes I'm using a Qwerty Microsoft Sculpt Ergonomic keyboard.

Further edit: OK it worked once, and now it's not working again even with the new mappings

Idiot alert! You have to place the blueprint first AND then move it up and down before confirming placement!

Edit