You can increase or decrease the spacing between lines in a paragraph and before and after a paragraph.
Tap in a paragraph, or select text, a text box, or a shape with text.
Note: If you’re using paragraph styles in your document and want to incorporate the line spacing change in the paragraph style, drag past the last character in the paragraph to include the formatting symbol (it’s invisible until you drag over it). For more information, see About formatting symbols.
Tap 
(then tap Text if you selected a text box or shape).
Tap Line Spacing, then do any of the following:
Set the spacing between lines of text: Tap 
or 
next to Spacing to decrease or increase the spacing.
Set the amount of space before or after a paragraph: Tap or next to Before or next to After to decrease or increase the spacing.