Altium Error? What is this reddish box?

Question

I've been to a couple introductory Altium trainings and everything goes fine and dandy. This is the actual first board I am working on by myself. I've been learning so much just by doing stuff myself but there is something that I can't seem to quite understand.

Whenever I transfer my schematic to the PCB is is placed inside this reddish box, I believe it is a Room. All the examples I saw during training didn't do this. And if I move the components outside the box they turn green (DRC error maybe?)

Does anyone know what this means?

Answer 1

That is indeed called a "Room".

Rooms are relevant if you're doing multi-channel design, as they let you copy the layout between channels.

It's also completely normal.

If you want to disable it, it's very easy to do:

• Click the room -> PCB Inspector panel -> uncheck "Rule Enabled" checkbox.
  
• "Design" menu -> "Rules" menu item -> In the tree: "Design Rules" -> "Placement" -> "Room Definition" -> uncheck all the "Enabled" checkboxes.
  

Alternatively, you can just delete the room, but it will come back next time you synchronize the schematic to the PCB.

Answer 2

No, this is the correct way to disable Rooms in Altium.

Go to Project -> Project Options

In the class generation tab, you can select not to generate rooms. If your project contains multiple schematics, then you'll need to untick this box for each schematic.