Google Galaxy Nexus Android mobile technology platform 4.0 Users Guide - Manual (Page 89)

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When confident that the transcription is accurate, Voice Search displays transcribed words as regular
text. Words or phrases for which it has provided alternate transcriptions are underlined.
G Touch a button at the bottom of the window to add any optional fields (you can also speak the
name and content of any of these fields in your original voice action).
G When you're done, touch the button appropriate to completing the action, such as Send.
Related topic
Voice Action commands