Minimise the active window.
Syntax DoCmd.Minimise
Assuming the default menus are available, use the Window menu to switch between forms/windows.
Example
DoCmd.Minimise
“To minimize suffering and to maximize security were natural and proper ends of society and Caesar. But then they became the only ends, somehow, and the only basis of law — a perversion. Inevitably, then, in seeking only them, we found only their opposites: maximum suffering and minimum security” ~ Walter M. Miller, Jr.
Related:
Maximize - Enlarge the active window
Restore - Restore a maximized or minimized window.