Prescient Author provide a facility to merge one project with the other project.
Select Tools menu from main menu tool bar and click on Merge Project menu. Select file for merging dialog will be displayed. You have to choose the ATH file for merging with the current file.
After selecting a file for merging Merge Entity Dialog will be displayed.
Following are steps for merging
Example of Merge Entity
Following example shows Merging Project with the other project