Safari full screen

Hello SallyRags,

There's no way to have Safari open in full screen each time. This article has the options you can take to resize your screen: Use apps in full screen on Mac - Apple Support

You can also maximize your Safari window by following the steps from this article:

Manage app windows on Mac - Apple Support

On your Mac, do any of the following in a window:

• Maximize a window: Press and hold the Option key while you click the green button  in the top-left corner of an app window. To return to the previous window size, Option-click the button again.

You can also double-click an app’s title bar to maximize the window (as long as the option to do so is set to “zoom” in Dock & Menu Bar preferences).

• Minimize a window: Click the yellow minimize button  in the top-left corner of the window, or press Command-M. You can set an option in Dock & Menu Bar preferences to have a window minimize when you double-click its title bar.

Most windows can be manually resized. Drag the window’s edge (top, bottom, or sides) or double-click an edge to expand that side of the window

Best Regards.