The Output panel displays a record of log messages recorded by Test Studio® for APIs throughout runtime. These include build errors that occur when a project is compiled.
Its default location is in the middle bottom pane.
You could chose between General and Compile option to filter the type of information in the panel.
In the General output you will see information about the test execution status, verification and log messages.
If your project contains coded items, the Compile output will display information about the status of the project compilation, including compile errors and warnings.