MailFirst Newsletter Optin form comes with different options to styles your Optin form. You can either select between pre-defined multiple templates and customize them or can create your own one.
To change the Optin form styles go to Newsletter > Edit Newsletter > Styles


In this section you can the style the form and its related elements
Background Color
To change the background color of the form part
Button Background Color
To change the background color of the button
Button Text Color
To change the text color of the button
Button Text
To set the text of the button
Form Orientation
To set the position of the form

In this section you can the style and set the fields of form and its related elements
Email Text Placeholder
To set the text of email field to be shown to the users
Name Field
To set the text of name field in case if want to display in the form
Fields Orientation
To the orientation of the form fields i.e. stacked or inline
Field Style
To set the styles of the fields of the form i.e. rounded or square

In this section you can set the style of the overall look of the box form
Border Orientation
To set the orientation of the border of the box i.e. rounded or square
Border Style
To set the style of the border, multiple option for the border styling are provided
Corner Style
To set the styles of the corner/borders of the box i.e. rounded or square

Some of the applied styles after applying are as below:
