1) place-content: normal

1.2) Unconstrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X

1.2) Constrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X

2) place-content: stretch

2.2) Unconstrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X

2.2) Constrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X

3) place-content: start

3.1) Unconstrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X

3.2) Constrained grid container

X
XXXX XXX XX X
X
XXXX XXX XX X
XXXXXXXXX X
XX
X
X
X
X