Thx @ReedRichards
Good to know that I can use both Auto mode and thermostat. I see above and in the user manual how to enable auto mode.
If I do that I can no longer see what the flow temperature is - as I thought I could when using Heat mode.
I don't think the compensation curves are set up and, as mentioned, I do not have doc on how to set them up. On a page above there is a video showing installer menus but evidently I have a different version.