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The layout property is a multi-level property that specifies two things: how the screen is divided into image boxes and how series are selected to fill each image box. As you begin expanding the nodes in the layout property, you will notice that from here, the configuration of image boxes on the screen can only be viewed, it can't be edited. To do that, click the record button to start recording the layout changes and use the Layout Manager 
; any changes made to the layout are automatically reflected in the currently applied HP. Selecting an individual image box node in the property grid causes the actual image box to be selected - this helps to make the connection between them clear. Once the desired configuration of image boxes has been set (1×2, 2×2, 1×4, etc), you can then specify how series are allocated to image boxes by setting the Flow Direction property in the grid. Image boxes can be further subdivided into tiles; doing so displays multiple slices from a series as tiles within a single image box. This is also controlled from the Layout Manager, and is reflected in the HP's Layout property. The Study and Series Selection Criteria are the set of rules that are evaluated when this HP is applied; together, they determine how series are picked to fill image boxes. How to configure and interpret these rules is described in detail in a later section.
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