How can I adjust my rich text heading and change the font on my homepage?

Hello, I was hoping someone could help me with some problems I have in a rich text section on my shopify homepage.

A) When I type in my Rich text heading i can’t press return and choose how many words are on each line. At the moment I type the heading in and the text automatically moves to the next line when it doesn’t fit.

Can you please show me how I can press return and deliberately move heading text to a new line.

B) Can you please show me how to change this font to Helvetica Neue Bold 16px.

I have attached some screen shots for reference.

Thank you.

@Timstar

Yes, please add this code

  1. Go to Online Store->Theme->Edit code
  2. Asset->/theme.scss.liquid->paste below code at the bottom of the file.
.rich-text .rte-setting {font-family: 'Helvetica-Neue-Bold';font-size: 18px;}
@media only screen and (max-width: 749px) {
.rich-text_heading--medium h2, .rich-text_heading--medium .h2 {
    font-size: 18px;
}
.rich-text .rte-setting {font-size: 16px;}
}

Thank you for your quick help.

@Timstar

its my pleasure to help us