Increase the font size in ProtonMail

You can increase the font size in ProtonMail by adding this custom CSS. Just remeber to edit the number values with your desired sizes.

h1 {
font-size:24px;
}

h2 {
font-size:22px;
}

h3 {
font-size:20px;
}

h4 {
font-size:16px;
}

h5 {
font-size:14px;
}

h5,h6 {
font-weight:700;
}

h6 {
font-size:12px;
}