How do I update a field within a form?

Each field within a form can be updated inside the form editor. Which edits can be made varies based on the type of field, but the location of the form editor and some basics remains constant.

Procedure

Click on the Modules tab in the upper left corner.
Click on the name of the module containing the field you want to edit. The Field List contains the basic definitions of fields, whereas the Default Form is where most changes that appear in the form are made.
Click on the Forms tab.
Click on the name of the Form you wish to edit.
Click on the Wrench icon beside the field you wish to edit.
See the articles for editing/creating specific types of fields.

Field Type	Explanation	Defining Characteristics
Text Fields	Allow users to input text as data.	A Placeholder Text option.
Numeric Fields	Allow users to input numbers as data.	An option for Initial Values.
Separator Fields	Are used to provide space between one field and another.	Only Properties and Debug tabs. Some (rows) lack properties tabs.
Comment Fields	Allow users to enter comments longer than the text box permits.	Lack validation and Custom JavaScript tab.
Action Fields	Allow users to preform some action, generally pressing a button.	Lack a validation tab.
Check Fields	Allow users to enter comments longer than the text box permits.	An Initial Value Field checkbox. Only the properties and debug tab.
Lookup Fields	A type of Dropdown Field that allows users to connect Lookup lists they've made with a Field in a Form.	A Lookup option. A Point in Time checkbox.
Select Fields	A type of Dropdown Field that allows users to type lists directly into the field.	An Options Tab.
Date & Time Fields	Allow users to enter a date and time.	A Format option. A Show as Hour Selector checkbox.
Phase Fields	An advanced option. Contact Support for more information.	An Initial State option. An Active States option. A Close State option. A Completed on Field option. A Format option.