To open a model and associate it with the current viewport, select the desired model from the Model list under the toolbar. The Model list contains all the models in the current model database.

ABAQUS/CAE switches to the selected model and associates it with the current viewport (indicated by a red border). The new model appears in the list of models under the toolbar.

You can have multiple models open at any one time; the title bar of a viewport indicates the model associated with the current viewport. You do not have to save the current model prior to opening an existing model because ABAQUS/CAE stores all models in the model database.