In the Navigation Pane, click Grammar, and then click Phonological Rules.
In the Phonological Rules pane, click the desired phonological rule.
In the Phonological Rule pane, right-click the desired item the Rule Formula field and click Set Phonological Features.
The Set Phonological Features dialog box appears.
In the dialog box, do the following:
Click the feature, and then, in the Value column select a value +, -, or a custom value you inserted. Or, select agree or disagree.
Repeat this step for each feature you want to insert. Click OK.
Click OK.
<n/a> removes a previous selection from the rule.
Insert a phonological feature value