The field is required. A * will be placed in the fields label.
No br
Don't place a <br /> (line break) after the field. Allows running multiple fields togethor on one line.
No paragraph tag around field
Used in table-based layouts to remove extra padding (use only table cell's padding). Also useful for making multiple fields run togethor on one line (think: buttons)
Checked ?
This checkbox or radio button is checked by default.
Don't render label in html
Used in table-based layouts, when one column contains the label, another column contains the form field
Allow Urls
Fields don't allow urls to be entered by default. With this selected, urls are allowed in the field.
Don't display in emails
don't include the field in emails.
Don't display in html
don't render the hidden field in html. The combination of these two can be used to add fields to the emails that aren't displayed on the screen.