How to center a background image?

Hi - newbie here, with a newbie question

How do you centralise a background image?

I can align left or right, but I need it to be centred

If you click into the background image layer, then you should see some settings for positioning it, which you can set to 50% horizontally if you want it centered. Let me know if that works for you

Thanks, that worked fine - I missed the % thing!