As a project admin, you can view and set the properties on project level in the Project Settings. Navigate to Easy JQL Properties for Projects under Apps.
Defining Properties
After defining the property values, click the Save button to store them.
String Property Examples | Image
Text Property Examples | Image
Number Property Examples | Image
Date Property Examples | Image
Due to limitations imposed by Atlassian, it's necessary to use predetermined property names in the JQL. You can observe these names in the name column.