Get there

1. Hover your mouse over the Create button (under the form of a +)
2. Click on the drop-down arrow to see the options list and select Customize

Customize the Create button options (+)

Keep in mind that the left column shows the options already available on the Create button menu, and the right column named Add to your menu shows the options you can still add to your menu.

Your Create button options can be customized in the following ways:

1. Add: drag and drop the right list options to the left list
2. Remove: drag and drop the left list options to the right list
3. Reorder: drag and drop options up or down 

Keep in mind that the line splits the visible options from the ones that can be seen by clicking on the drop-down arrow in the previous menu.