How to change the letter spacing in your document:
Select the text area in your document whose letter spacing you want to change.
In the “*Publish” menu ribbon, in the “Typography” group, click on the lower half of the “Typography” button and press the button you require in the “Word spacing” function. In this example, the letter spacing is changed to a smaller value than before by using the “Reduce” function.
The letter spacing of your selected text area is changed by 0.05 Pt.