One of the most important ways to make speech sound natural is to emphasize it correctly. Proper emphasis can also change the meaning of a sentence. For instance, these two sentences mean different things:
We CAN do it!
WE can do it!
In Text Speaker, emphasis is shown by speaking the emphasized text more loudly.
To emphasize a word or a phrase, select it and click Edit >> Emphasize Selected word / phrase.
The text is now surrounded by <emph> and </emph> tags.