The 'X' you will have to draw with lines in an annotation layer (or any layer that is visible really).
For the grey projection of the ground floor, you can overlay the ground floor and upper floor drawing in the layout.
Use a grey pen set for the ground floor.
You may have to create the pen set by duplicating an existing one and changing the colours to grey.
This way you can control how grey you want the pens to be, some can even be black or remain coloured.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11