1. Click Projects (Project Templates) Management in System Admin page, and the Project (Project Template) List page appears.
2. Select the project (project template) that you wish to manage, click
in Manage column of Project (Project
Template) List page,
and the Project (Project Template)
Management page appears.
3. Click Issue Types Management in Project (Project Template) Management page, and the Issue Type List page appears.
4. Select the issue type that you want to manage, click
in Manage column of Issue Type List page,
and the Issue Type Management page appears.
5. Click Fields Management in Issue Type Management page, and the Fields Management page appears.
6. Select "When" rule in the
Fields Management page, click
in Field Rules Configure column on the right, and the When Rule of Field
page appears.
7. Click Add in the When Rule of Field page, and the Add "When" Rule to Field page appears, as seen in the following figure:

Select a field to set "When" rule.
Set value to the selected field for "When" rule to match.
Using Dynamsoft Issue Tracking Anywhere > Projects (Project Templates) Management > Issue Types Management > Field Rules Management > Add "When" Rule to Field