1. Select the Container Block and set the Vertical Alignment to center.
2. Remove the Page Hero from the Header Element.
Just use the Header Element to merge the site header.
Then you can just add the first section into your page content like the other sections.
1.
the Vertical Alignment to center is not working.
I think it is because I made the full screen height in the additional CSS.
So, I expect that I need to make the vertical center in the addtional CSS.
2.
I don’t understand what you mean?
Do you mean I have to make the block -> header?
I made the merged one in the header elements and there is no way to add more images there.
3.
I mean the button. there are 2 buttones on the image and I wanna make it squre.
Delete ( or Quick Edit > Change Status to Draft ) on your current Header Element.
Then create a Header Element just for Merging the Site Header – see here: