For the Field Caption you can choose to use the default caption (also known as Friendly Name) that is associated with the field definition or you can create custom caption to be used on this form only form. This allows for the same field to be used on different forms for a different use.

Each field on the data entry form can optionally have help text associated with it. If help text is used, a question mark (?) will appear beside the field caption and hovering over the field name with the mouse pointer will display the help text. The help text can be the system default as defined in the description of the field in the field definition or custom help text can be used for each form.

Text, comment and date fields allow for an in field prompt to be used on the issue details page. This text will appear in grey in the field before data is entered by a user.

This setting allows the field to span more than a single column or a single row. For example, the section properties may be set to multiple columns but you want a text field to span across all the columns.

 

For some field type this will have no effect. For example a check box cannot span rows or columns and a drop down can span columns but not rows.

 

Also, fields in the last row cannot be set to span rows and fields in the rightmost column cannot span columns. There must be space (i.e. no other fields) beside or below the field being spanned. Some trial and error may be necessary to attain the desired effect.