How to use basic UNIQUEID()?

[edApps]

I'm new to GAppSheet. I regret to ask this question, but after several online videos and lots of poking around, I still can't understand how one sets a particular column to the UNIQUEID() setting. I have a column named [_RECORD_ID] that I'd like to  use as an automatically generated ID value. Where and how do I do that? I've tried to set the auto value to =UNIQUEID(), but it calls that invalid. So, I'm at a loss.

Thanks

[edApps]

I figured it out. So perhaps others will benefit from this answer. 

1. Set column to be used for unique id to text data type.

2. Edit column attributes, then select "Auto Compute."

3. Enter =UNIQUEID() as "Initial Value."

4. Done. Save.