Move console, bt-mon, etc to RTT

I need to move everything off of UART0 so I can use it for my touchscreen

On a previous post I was told I could move everything to RTT in the overlay, but when I try to do that with the snippet below:

zephyr,console = &rtt;
zephyr,uart-mcumgr = &rtt;
zephyr,bt-mon-uart = &rtt;

I get the following error:

Unknown reference to &rtt for all three lines.

In the DTS I have this:

zephyr,console = &uart0;
zephyr,shell-uart = &uart0;
zephyr,uart-mcumgr = &uart0;
zephyr,bt-mon-uart = &uart0;

How do I change those to RTT?  What am I missing?

Stephen

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