Some fields have a Prevent Fields from Being Updated check box in the Field dialog box.
Marking this check box adds a switch in the code string for that field.
For example, the only field that can be updated automatically (when any change occurs) is the “Date” field!
Why this option is exclusively set to the “Data” field? Word has never had such an option, but has had an option to update links automatically. There are numerous fields a user wouldn't want to update automatically, including ASK & FILLIN fields.
thank you I’m still wondering why –up to now- there isn't an option that updates all the fields automatically!
Now that you know about the fields you can insert, let’s look at how you can edit the properties of a field and update its values after insertion.
Most fields are not automatically updated each time you open or save the document.
(In this way, they differ from OLE linked objects, which are automatically updated by default.) To update a single field, select it (or click anywhere in it) and press F9, or right-click the field and choose Update Field.
If the update takes too long, you can abort it by pressing Esc. Certain fields are not affected by performing an update because they do not pull information from a source that can be changed.
, so they are never updated even when someone issues an Update Field command on them.