Acumatica Report Designer 101
Installation: The Acumatica Report Designer is installed on a Windows machine with the Acumatica Server’s installer.
Example to open and edit an Acumatica report: AR Aging.

Open the Report Designer in Windows by finding and clicking on its icon.
Click File → Open From Server
Web Service URL: Enter the plain Acumatica URL.
Login:
Single company: UserName
Multi-company: UserName@CompanyID
Enter the report code. It’s the code showing on the report’s URL plus ‘.rpx’.
Click Ok.
To view the data modeling (tables and joins): File → Build schema.
Note:
Viewer Fields
tab →Load used fields
will list the report’s fields.
To view the content of a field, select it on the main panel and see details on the Properties panel on the right.
Some of the report logic might be easier to find via the files XML:
File → Save As → save it locally.
Open the saved file with a text editor (ex.: Notepad), and then search for the desired fields. Here are two examples: