The page editor allows you to assign custom classes/styles to elements in the content area.

There are 3 custom button options for your site.  You can highlight text in your content area, select the link icon to assign a link and then choose the button class from the formats menu.  The three options are "smal-btnl", "medium-btn" and "large-btn".

This option allows you to add preset formatting to specific quote or block of text. To use this option, you will need to highlight the text, choose the formats menu, Blocks, then Blockquote.