Hey there,
It is a correct and default behavior for it.
Because different heading already have different size and it is impossible to set the font size of the heading.
But you can add the following Custom CSS code into
Backend > EasyBlog > Themes > Custom CSS so that you can adjust the font size of the h1 and h2 for the blog entry:
body #eb .eb-entry-head h1{
font-size:100px;
}
body #eb .eb-entry-body h2{
font-size:100px;
}
You need to change to the value that you want.
You need to clear all of your caches before you see the changes.