To add a new line of text without a space between lines,
hold down the shift key when pressing enter

That adds just a line break instead of a new paragraph break.

HEADING 1
second line

Normal paragraph format underneath.

Heading 2
second line

Normal paragraph format underneath.
Another line of normal paragraph.

Header 3
second line

Normal paragraph format underneath.
Another line of normal paragraph.

Heading 4
second line

Normal paragraph format underneath.
Another line of normal paragraph.

Heading 5
second line

Normal paragraph format underneath.
Another line of normal paragraph.

Content Title

Another line of normal paragraph.

Button

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque tristique venenatis augue, vel rhoncus mi sodales sed. Maecenas sed lacinia eros. Nulla sit amet pretium magna, et finibus tellus. Vestibulum nec pulvinar sem. Nullam id rutrum enim. Proin in aliquam turpis, sit amet suscipit nunc. Ut aliquet consequat facilisis. Vivamus urna lorem, cursus vel dictum nec, lobortis eu felis. Integer lobortis mattis nisi, in posuere elit vulputate non. Phasellus pellentesque non ex nec ultrices. Aliquam eu tortor a tellus dignissim finibus. Suspendisse porta urna sit met elit venenatis laoreet

1. test one
   1. sit amet sed justo.
      on two lines
   2. something else
   3. some other list
      1. more lists?
      2. something else
2. another list item
3. Morbi egestas orci quam, eget egestas arcu dictum non.
4.  sdf 

• Vestibulum ante ipsum primis in
  on two lines
  • another indented list
    • and another indented list ...
    • another item
• faucibus orci luctus et ultrices posuere cubilia curae;
• Vivamus ut vestibulum lacus. Aenean in dignissim ante.
• another item
  on two lines
• another

This is a quote using the quote button on the toolbar.

cited work