1.   If the snippet name doesn't have a space in it, type the snippet name and press the spacebar. Your snippet name will now be replaced by the snippet text; or

2.   For all snippets, go to the Snippets Tab.  Highlight the snippet code you want to insert.  Right click and then left-click on the 'Insert Snippet Into Text' button.  The snippet code will be inserted in the document you are currently editing.