reduce the space between a header and the body text in pages 5.6.1

For Pages v5.6.2 (or v6+)... from the View menu, select Show Layout. Next, click on Document in the Toolbar, and then only decrease the Document top margin by one downward click to 0.75 in. You will observe that the gap between body text and the top header is now closed. No changes to spacing, or other margins is necessary when using the default Blank template.

The header/footer, and document body objects are not selectable, and this prohibits altering them directly.

Using exactly your settings in a new blank template (I made it A5 so the screen snap was more compact):

Going on another post of yours where you are equally adamant that you are right and we are all wrong, I am guessing you have grabbed one of the faulty CV templates and modified it.

Peter

I started with a blank template, and made one simple correction to the top document margin. Nothing else. I am not looking over your shoulder, so have no idea what other settings you may have changed. Clearly, I did not set the top document margin to 0.

Default blank template settings:

After one downward click on the Top Document Margin:

You are making this too difficult for yourself. The document body spacing is set from the Format Text panel : Spacing.

Why don't you simply experiment as Viking and I have done to simply see what happens? Instead of swearing at your Mac.

The Header and Footer contain the page margins at the top and bottom.

The body text does not overlap them so always sits below and above them in turn. Moving the Headers and Footers thus moves the body text between them.

Peter