When the Options menu >
Auto Refresh command is active (preceded by a check mark), SAP2000
will automatically update the on-screen display each time changes are
made. When working with a very large or complex model, turning this feature
off may be helpful to reduce downtime associated with redrawing the model.
When the feature is turned off, use the Refresh Window
button or the View
menu > Refresh View command to update the on-screen display.