When you create formula and database fields in Write, Spreadsheet and Database, you can also decide how you want the fields to be editable. This is done through the control type that you set for the field. There are six standard control types:
Edit box (see Edit box control type)
Check box (see Check box control type)
List box (see List box control type)
Combo box (see Combo box control type)
Spin edit (see Spin edit control type)
Radio group (see Radio group control type)
These can be used with formula and database fields in all the applications.
After you have set the control type for your field, and hence how the field will be editable, you can, if you want, set options for how the field will operate. There are four choices:
The Edit Source option allows you to change data from either side of a two-way link.
The Hide Zeros option allows you to hide any zeros, displaying a blank field instead.
The Hide Errors option allows you to hide any error messages, displaying a blank field instead.
The Show as control if inactive option allows you to show the control type itself, even when the field is not currently selected ("inactive").