Tool tips are a function of accessibility to support screen readers and follow accessibility guidelines, for example, Section 508 in the U.S. If a field does not have to be filled I believe the general accessibility practice is too exclude the field from a screen reader. Thus, fields that are not "user entered" do not generate tool tips.
Here's what I have done in the past. The question mark icon is an image field with a button laid over top. The button has no visual properties.
When you hover over the image you get a tool tip.
When you click the button you get help using xfa.host.messageBox.
The script on the button is as follows:
var msg = "Please complete the table by..." + "\n"
+ "and then..." + "\n"
+ "to complete." + "\n";
Help-Btn.pdf 77.9 K
With a little experimenting, this works nicely. Thank you. Christina
Thanks very much for your reply. It works nicely.