Thx, this is just the kind of feedback I need.
The one thing I can't seem to find at the moment is a way to change the text in the room box, i.e. the Room ID.
The LogicID can be changed by selecting it in the Resource list, then choosing Description command on Resource menu. You can also change by double-clicking directly on the property box (below the resource list). These changes are dynamically linked to the Layout editor so you will see changes made immediately. You can also select the Description command when you are editing a resource. But I can see that it would be intuitive to be able to change ID from within Layout editor- that's easy to add.
So I had to resort to deleting the room (I did this within the layout tool) and recreating it with a different name. I was able to pick the same Logic number, which was good.
When a room is deleted, any exits from other rooms to the deleted room should show up as errors (arrows pointing to red triangles). Did you see them?
When I tried to link it back up to the other rooms, I somehow ended up linking in to the middle of the room, so I attempted to delete the link, but both the link and the room box disappeared. The Logic was still there in the resource list though but I couldn't work out any way of adding it back in to the layout. If I tried the show room option, this particular room wasn't available for selection, even though it existed in the resource list and wasn't shown in the layout.
I'm not sure what you mean by 'linking to middle of room'? Can you elaborate? If the room was not in the list, then the layout editor thought it was being drawn- that's not good. If you are able to duplicate it, the exact steps taken would be helpful.
So I had to delete it again, this time with the right click option in the resource list. What appeared to have happened when I reopened the layout tool is that another one of the rooms had disappeared from the layout. The links from the two rooms that it joins to were still there but the box for the room was missing. I was able to add the original room that had disappeared (and that I then deleted) back in, and I was able to join it back up to the rooms on its side, but after saving this, then closing and reopening the layout tool again, the second room that disappeared mysteriously reappeared again but the original room that disappeared that I had recreated and linked up again has now disappeared again. Not sure how to get around this now. The original deletion of the room appears to have confused the tool.
I can't seem to replicate your situation exactly, but I do see there are some problems when deleting then re-adding rooms. After several times of adding, deleting, redrawing exits, I also got a bunch of 'straggler' lines that didn't seem to connect with anything. Selecting and moving them eventually causes a hangup. I think I can track this down though, and fix it.