Overflow

Visibleeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Hiddeeeeeeeeeeeeeeeeeeeeeeeeeen
Scrolllllllllllllllllllllllllllllllllllllllllllllllllllllll
Autoooooooooooooooooooooooo

Positioning

Normal positioning

Big box
Box 1
Box 2
Box 3

Relative positioning

Big box
Box 1
Box 2
Box 3

Absolute positioning

Big box
Box 1
Box 2
Box 3

Fixed positioning

Big fixed box
Box 1
Box 2
Box 3

Z-index

Big box
Box 1
z-index = 1
Box 2
z-index = 2
Box 3
z-index = 1

Floating elements

Big box

Floating box 1
Floating box 2
Floating box 3
Floating box 4
Floating box 5
Floating box 6