When execution is paused inside SeqZap Studio the values of the variables in the current procedure can be inspected using the Variable Inspection view, available from the View menu or using the keyboard shortcut Alt+V, V.
It is also possible to see the variables of other items in the current call stack by double-clicking the call stack in the Execution State view.
Many tools also allow inspection of the state of the tool, or the target/instrument which the tool is connected to, by opening tool panels on the tool.