Master Slide custom layouts

Hello, been using MS Office forever and I am trying to use impress for my personal use. I am use to being able to create my own layouts associated to the master, but I can not find this capability in impress. I see layouts that are provided, but they do not match my needs. How do I create customer layouts please?
Thanks
Richard

Can that help?

My Master Slide in Impress

My Presentation in Impress


English documentation