Hi aurelia01
If you want to change it globally, you can chnage via LESS file.
The file declares for these headings is: /templates/ja_mono/less/typography.less
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
font-family: @headings-font-family;
font-weight: @headings-font-weight;
line-height: @headings-line-height;
color: @headings-color;
as you can see that headings are set to inherit font family from headings-font-family variable which is declared in this file:
/templates/ja_mono/less/variables.less
@headings-font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
you can change it here or create a new variable and set the font family as you wish.
Once done, you need to compile less to css in template option (before compiling, REMEMBER to backup CSS files first and it may override current css files)
Regards