Your own Dictation Commands
To create a command that types ‘MacFormat’ when you say ‘macformat’, open the Accessibility pane in System Preferences and select Dictation. Click Dictation Commands and then press the ‘+’ at the bottom of the list. Type ‘macformat’ in the When I Say box, then choose Paste Text from the Perform list. Type ‘MacFormat’ into the box that sits below. You can use this to create shortcuts for long passages of text too, by giving them a unique ‘When I Say’ and typing the passage into the ‘Perform’ box.