how to change the head font size?

[668168]

I has try as below in custom css, but no any change in edit mode.
could you kindly help me?

.workspace .cm-header-2,
.workspace h2,
.print .cm-header-2,
.print h2 {
  /*font-variant: none;*/
  border-bottom: 1px dotted #F00;
  /*  font-variant: common-ligatures small-caps;*/
  font-variant: common-ligatures;
  font-weight: 500 !important;
  font-size: 25px !important;
  font: 18px !important;
    width: 350px !important;

}

[ebullient]

Header font size is coming from app.css (I don't set them), so you should be able to tweak these in a snippet:

:root {
    --h1: 2em;
    --h2: 1.6em;
    --h3: 1.37em;
    --h4: 1.25em;
    --h5: 1.12em;
    --h6: 1.12em;
}

[668168]

thx for your patience, it works!