I use shortcodes in the form itself like this example.
<div>
[bscolumns class=”one_fifth”][/bscolumns][bscolumns class=”one_fifth”][/bscolumns][bscolumns class=”one_fifth”][/bscolumns][bscolumns class=”one_fifth”][/bscolumns][bscolumns class=”one_fifth_last”][/bscolumns][bscolumns class=”clear”][/bscolumns]
</div>
These shortcodes are for responsive columns, so on the frontend people will see 5 columns next to each other and they can enter their text. But in the e-mail itself I do not use these columns, I send the data in a table.
From what I read you can use any shortcode in the form (with help of the plugin), but I did not yet try another shortcode from another plugin.