How to control what is shown in the sheet views?

I have not figured out how to control what is shown on the sheet views.   Sometimes a sheet shows my whole drawling. At other times it seems to be zoomed in on a small portion of the drawing.  After selecting the Sheet tab, the zoom and pan options work on the Sheet tab as a whole, not on what is shown on the sheet.

How can I configure what is shown on the sheets?  I would like to setup different sheets focused on different parts of the whole drawing.  Is this tied to setting up new views (which I haven't done) in the model page?

I'm using the default settings for the model and sheet pages.

I tried searching learning resources and didn't fine help on this topic.

Thanks everyone.