You can increase or decrease the distance between lines of text using the Line Spacing control in the format bar that appears when text or a text box is selected.
For even more fine control of line spacing, use the controls available in the Text inspector.
Select the text you want to change and then choose a value from the line spacing pop-up menu.
Selecting Show More opens the Text inspector.
Select the text you want to change.
Click Inspector in the toolbar, click the Text button, and then click Text.
Move the Line slider left to decrease spacing or right to increase it.
To specify a precise line spacing value, type a point value in the Line field, or click the up or down arrow next to the field.
Choose a line spacing option from the Line spacing pop-up menu that appears when you click the text below the line field.
To adjust the spacing between paragraphs, see Setting the Spacing Before or After a Paragraph.