Figure 14: Expressions window
The Expressions pop-up window (Figure 14) provides a dialog box for specifying constants, variables or operators defined by the language you use. In Figure 14, the registers which have been set are shown in the window as a and c with their corresponding values, 4 and 0, which, after updating, derive the new value, 9.
There are also the three following buttons at the bottom of the Expressions window: Delete, Close and Help.