editor; double linebreak and capital start letters

[claustrier]

Is there any way to make the editor default a single line break when pressing enter?

And also, can a new line always start with a capital letter?

[opentype]

There is no “double line break”. It’s a paragraph with certain spacing settings you can override in your custom.css.

There you could also make the first letter uppercase.

p:first-letter {
    text-transform: uppercase;
}