When you edit a model, the Text Editor has two special features that allow you to do "within the editor" causal tracing.
•As with all other windows, double-clicking a variable name selects that variable into the Workbench.
•If you enable entrainment (by clicking on the Entrain/No Entrain button, or press F7, or numeric keypad 7), double clicking on a variable on the right side of an equation moves you to the equation defining that variable.
With these features, you can trace causes purely inside of the Text Editor by double-clicking on the right-hand side of equations.