DoCmd.Maximise

Enlarge the active window.

Syntax
      DoCmd.Maximise

When an Access window is maximized, all other windows will also be maximized when you open them or switch to them.

Pop-up forms are never maximized. To format a form as a PopUp, set the forms PopUp property to True.

Example

DoCmd.Maximise

“We’re not here to leave a mark, bro. Monuments, legacies, marks - that’s where we always go wrong. We’re here to revel in the world, to soak in the awesomeness of it, to enjoy the ride. The world’s maximum perfect as it is, beauty from horizon to horizon. Any mark any of us tries to leave - hell, it’s only graffitti. Any mark anyone leaves is no better than vandalism” ~ Dean Koontz

Related:

Minimize - Minimise a window
Restore - Restore a maximized or minimized window.