I want to make my layout view bigger. How can I expand it to the full extent. Sorry if this seems like a stupid question but I've tried everything and it doesn't work.
Since I dont know which of these two you meant, To make the actual layout view map larger on your screen use your mousewheel (also right click and zoom to whole page, but this may not zoom in as much as you want.) Or use the layout toolbar and the layout zoom tools...
To make the map fit the actual extent of the page right click on the map, then distribute, then fit to margins