Ever want to add help text to a form in Drupal? Don't like a field title chosen by the developer? Want to change the description of a form field? Want to move a field to the top or bottom of a form? Want to do all of these things without any PHP code? This is your module.
Form Defaults will let you alter the defaults associated with a form, enable the forms module below and look for the  controls in the description of each form field. Navigate to the form and click  link on the field you want to edit. You'll be allowed to edit field titles, markup fields as well as the textual descriptions with each field.