Suddenly, large text in the editor

What di yao have in the ‘CSS Inserts’ option?

Sorry JD, been tied up (but not in a nice way)
In the CSS Inserts box currently —

h1 { font-size: 34px; line-height: 1.2; margin: 0.3em 0 10px; }
h2 { font-size: 28px; line-height: 1.3; margin: 1em 0 .2em; }
h3 { font-size: 24px; line-height: 1.3; margin: 1em 0 .2em; }
h4 { font-size: 19px; margin: 1.33em 0 .2em; }
h5 { font-size: 1.3em; margin: 1.67em 0; font-weight: bold; }
h6 { font-size: 1.15em; margin: 1.67em 0; font-weight: bold; }
body .gform_wrapper .gform_body .gform_fields .gfield input[type=text],
body .gform_wrapper .gform_body .gform_fields .gfield input[type=email],
body .gform_wrapper .gform_body .gform_fields .gfield input[type=tel],
body .gform_wrapper .gform_body .gform_fields .gfield input[type=url],
body .gform_wrapper .gform_body .gform_fields .gfield input[type=number],
body .gform_wrapper .gform_body .gform_fields .gfield input[type=password],
body .gform_wrapper .gform_body .gform_fields .gfield select,
body .gform_wrapper .gform_body .gform_fields .gfield textarea {
font-size:14px;
}
#text-16 a:link {
text-decoration: none;
font-weight: bold;
}
#text-16 a:hover {
text-decoration: underline;
font-weight: bold;
color: #FD0006;
}

Hello JD, are you there?

what happens if you swap to one of the default themes?

Hello
The song remains the same I’m afraid – the default text in the editing window is very big as you type and edit, although the site as it appears to the world is fine.
Strange, eh?
AW

Well that means it’s not a theme issue

did you try disabling ALL your plugins?

I regret that on live sites, as you will understand, this is not always feasible. Thanks for your help anyway, I may have to live with it …