The preview session allows you to review the images and refine them for any corrections. You need to review and provide feedback on all the images to guide the improvement of image quality.
The previous topic lists the steps to providing inputs and generating a preview session.
Refer to the following video for step-by-step instructions on reviewing a preview session.
Review the images and accept them once you are satisfied with the results. You can also view the spec or refine the results to create a new image specification.
Review Preview Results
Once the preview session is generated, review the image results to either accept or refine, as needed.
Open Preview
In the Datagen Projects screen, on the project card, click View.
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Open the Dataset specification version where the synthesized concept images are saved.
You will be presented with the results if the Preview session is complete.
Review Results
On the preview screen, you can perform certain actions that will help in reviewing the results. 
Use the control options, on the preview screen, as needed, to review the results.
Note the preview icon on the top-right corner of the screen. The icon indicates that it is a preview version.
Enable or disable the Show Bounding Boxes option, as needed, to view the area on the image that is marked for synthesis.
Click the View Spec button at the bottom to view the spec details against which you are reviewing the results.
From the Specification screen, you can again click the Show Preview to go back to the preview result screen.
If the results are acceptable, click the Accept button to freeze this specification and initiate a generation session.
However, if the results are not as expected, click the Refine button to update the specifications, as explained in the next section.
Refine Preview Results
If the preview results are unacceptable, click the Refine button to generate a new version.
Refining the preview results creates a new spec version for providing feedback.
Select one or multiple images for which you want to provide feedback.
Note that the spec version is indicated by a pen icon, implying that the spec is now in draft mode and can be edited.It is mandatory to provide feedback for all the images in a preview session.
For a single image, select the required image, and click the thumbs-up or thumbs-down icon from the action bar to provide feedback.
For multiple images, provide bulk feedback.
Select the required images, and click Bulk Feedback.
In the Bulk Feedback pop-up window, enter the Rating and Comment, and click Submit.
Filter icon
Use the Filter icon to view either the images without any feedback or the images with feedback, as needed.
Click Save to record the feedback. Before re-running the Preview, feedback must be provided on all images.
Click Run Preview to generate another preview session of the images.
Preview generation
It will take up to 72 hours to create the next version of the specification. Review and iterate over the specification until you obtain good-quality preview results.
Once the required results are available, click the Accept button and proceed to the Generation session.