Occasionally the camera for the FSEE external viewer is in a different position. This will cause the viewer and beamspot to be out of picture and/or the image will be stretched. This will cause the measurement of the external beamspot size to be inaccurate.

Below is a screenshot of the external viewer D2597 when the camera has been bumped slightly.

There may already be a Viola setting that is correctly transformed. Do File → Open Setting and load the setting from /files/shared/beamops/FSEE_operation/ViolaSettings. If this does not correct the issue you need to use Transform & Trim.

Do Option → Transform & Trim. This brings up the following window