Giving Your Forms a Consistent Look and Feel
To give your standalone forms the look and feel that is consistent with your website you can set up the header, footer, and content that will be shown surrounding them.
To do this, go to Forms | Branding and click on the Standalone Forms tab.
You may require HTML skills to achieve the required result - your web designer should be able to help.
Basic HTML to centre your Form
For Standalone Forms, you can add some HTML code to align the form to the centre of the page - the code can be inserted via the Source icon on the text editor for each of the sections.
Header and Footer sections
<p style="text-align: center;"><img alt="" src="your image detail.png" style="width: 150 px; height: 100px;" /></p>
Width and Height can be altered to suit your own image.
<center>enter your text here</center>
Left and Right Sides
To get started building your first form see this article.