on the Interface Build toolbar.Use a model view to display model structure as part of an interface page. Model views are created automatically for stories and will occupy the entire page. To add one to an interface page, use the Model view button on the Interface Build toolbar.
During story telling, the visible content in the Model View is used to determine what variables and connections simulate. This information isn't used for regular interface pages, butyou can still specify what variable to show in the model.
Model specifies which module you want to display content from. The default is Top-Level, but you can select any module from the list shown. If your model doesn't have modules, only Top-Level will be available.
Size to Page resizes the Model view so that it occupies the entire page. This is the only size available in stories, so this button isn't visible then.
Change visible variables lets you select which variables will be shown in the model view. Click on this to open the Visible Variables dialog
Highlight variables lets you select which variables will be highlighted in the model view. Click on this to open the Variable Highlight dialog. Only visible variables can be highlighted.
Typically, you won't want to display the full extent of the model in a model view, or you'll need to zoom to make the content visible in the available area.
Don't allow user to change visible region, if checked, means that the user will be able to see exactly what you do. If you uncheck this, and the model area is bigger than the model view area, scroll bars will appear, allowing the user to scroll to different parts of the model. Generally, it works best to leave this button checked, but sometimes allowing scrolling is better than zooming out significantly.
Fit to contents will fit the entire contents of the model into the model view area and center it, zooming in or out as necessary.
Zoom lets you select a zoom level. Drag the scrollbar and let go at the zoom level you desire. The new zoom will be displayed in the model view when you let go of the mouse (not while you're dragging).
The Position window below Zoom shows you what area of the model is being displayed. The gray portion represents the entire model area, and the white portion represents what's being displayed. Drag the white box to change its position. If you position it at the upper left hand corner, the upper left hand corner of your model will be displayed. If you move the white rectangle down and to the right, you'll expose model structure there, which will make the visible structure seem to shift up and to the left (counter-intuitive behavior).
Using the Styles Tab (Interface) 
, you can set the position, width, and height of the model view, and also whether it's locked. Locking of model views is often useful.