Hey, thanks for the quick reply and it was fun to try out, will be doing more in the future (today even, if I get time!)
The delete mode thing is less to do with knowing which mode than being able to change which delete mode I was in; because the submenu disappears I have to open it again to change delete mode...
For mixed use it was placing the zones that was more confusing... you have to select mixed use when you place the original plot and then you can zone from whichever type you want and add things from rooms from whichever type but it was that initial choosing mixed use that was confusing since that zone has almost nothing in it - also that a good half of building here are "mixed use" by this games' standards! (Here many people would expect that the ground floor is a shop regardless if it is in a residential, commercial or industrial district!)
So I just wondered if you could automatically make a building mixed use if someone tried to add different zones to a building - that way there is no need for an error message and no need for the "zone" mixed use in the build menu, two birds, one stone ;)
I also wondered if maybe it would be better to have the roof as it's own separate zone so that roof furniture (e.g. solar panels, air conditioner units, solar heating units, wind turbines, TV arials, mobile phone masts etc.) could be added, also it would allow the player to decide whether an area should be roofed or not - e.g. roof gardens, balconies etc. shouldn't be roofed. It would be a zone every building could have but also would not trigger a building to be mixed use - kinda like the parking lots out front.
I also wondered if external pillars could be added that would allow a zone on the second floor to extend beyond the first floor zone? these pillars might not be necessary but they'd be nice to have architecturally... for example, to created a covered walkway under the side of the building or to create covered walkways and bridges in general...
Just my thoughts while I was travelling today - clearly I have been bitten by the bug to play more of your game! :D - I even considered creating a github for storing my blueprints! :D :) - we'll see I guess!
Thank you for your time and effort.