About Compact Forms
Compact Forms presents text fields for selected forms in a more compact fashion
The form item/element fields are overlaid with their respective labels. When
the user focuses a field the label fades away nicely, and if the field is left
empty the label fades back in again.
See after, the label is positioned inside the field:
You cannot see the fade effect in this still image. When user focuses on the item, the text disappears. If they leave the field blank, the label text fades back.
Step by step
1. Identify the form ID.
First create your form and view it in your browser. Check the id for the form you want Compact Forms to affect. See an example, in this case the id is 'node-form'.
Tip: use Firebug in Firefox to Inspect element and see source and information of a selected item, such as a form.
2. Configure Compact Forms
In the 6.x version visit:
Administer › Site configuration › Compact forms
Located at your site at http://example.com/admin/settings/compact_forms
In the 7.x version visit:
Home » Administer » Configuration and modules » Content authoring
Located at your site at http://example.com/admin/config/content/compact_forms
You see the default form id is for the user login.
Add your chosen form id.
In this case it is node-form. This will affect all node forms.
This is how Compact Forms will make your form look with default settings. You can improve the display with CSS.