OEM Cloud Control 12c: Discovering new Oracle Homes

A thing that I repeatedly forget is how to do this.  I'm writing it down in the vague hope that I'll remember next time.

Take running database, already monitored by OEM 12c.  Install new version of Oracle Home using OUI.  Try to use OEM 12c to upgrade database, but find that OEM doesn't know about the new home.

How do you add the new home?  "Add target" menu doesn't work.  Where is it?

Instructions are here: https://docs.oracle.com/cd/E24628_01/doc.121/e24473/discovery.htm#EMADM13141

The secret is to create a new job, of the "Discover Promote Oracle Home Target" type.  Add in the path to the Oracle Home, let the job run, and voila.  Your new Oracle Home is now available.

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