CSS font demo

/*font-family*/

p {
    font-family: Arial;
}

h1 {
    font-family: Georgia;
}

/*font-size*/

body {
    font-size: 10px;
}

h1 {
    font-size: 5.0em;
}

p {
    font-size: 2.0em;
}

span {
    font-size: 2.0em;
}

/*font-weight*/

p{
    font-weight: normal;
}

/*line-height*/

p {
    line-height: 1.5;
}

/*text-align*/

h1 {
    text-align: right;
}

p {
    text-align: center;
}

/*text-decoration*/

p {
    text-decoration: underline;
}

h1 {
    text-decoration: line-through;
}