Gravity form: remove dotted lines and align button

hey there,
got the gravity form plugin and some little details bother me. everything is described in this screeshot
This is the site I’am working on.
thanks for your help!

p.s how do you find the class to customize the desired area? I used the inspect tool in chrome but didn’t get a pointer on the dotted lines

Hi There,

To remove the * character, please uncheck the required rule in your fields:

After that add the following css under Customizer > Custom > Global CSS:

.gform_wrapper .gform_page_footer {
    border: none;
    text-align: center;
}