The 4D Flow workflow starts on the VOIs & Tracking page, which has 4 sub-pages. As illustrated below, the sub-pages can be switched with the selection in the upper right or the adjacent arrows.
On each page, the user has to perform an operation or configuration, and then activate the blue action button in the lower right for proceeding. Correspondingly, an operation is performed and the result shown an the next page. After leaving the TRACKING page, the resulting streamlines are visualized on the 3D page.
In order to test a different tracking configuration, the user has to return to a prior stage by selecting the VOIs & Tracking page again, choosing the appropriate sub-page, and then proceeding from there as with the initial workflow by the blue action buttons.