Trying different editing features...

Release your inspiration...       This is the "P" option, which I think is for Paragraph.   Keep typing without hitting Carriage Return, and the lines should be single spaced.

Hit a return, and it double spaces, and creates a new paragraph.  Blah blah blah blah blah blah blah blah blah.

The bolded H, creates larger and bolded text.  Blah blah blah blah blah blah blah blah.

The Regular H types in this text... kind of grayed out.    Type text, select, then you can select B, I, to Bold or Italicize.    Can also select to create a Link to a URL.

It doesn't look like I can choose/change colors of the text.  No options for colors.   
Hit the Line Break icon, in front of text, and it will create a line break, wherever your curser is.

• you can hit the Bullet icon at the beginning of a line, to get a bullet, which also indents.
• hit return, and it bullets the next line, until you select the bullet icon again, to turn that option off.

1. Hit the numbers icon to create lines with numbers, and so on.                         Type continuously to keep in same numbered paragraph.
2. Hit Return, to get a new line with the next numbered paragraph.
3. Return for Three
4. Deselect the Number icon to turn off.

Press P to start a new paragraph

Or H

Or Bold H