On the Layout tab of the objects properties window you can find the conditional option. Enable it and you can enter an expression that should return true (any number other than 0) or false (0) to show or hide the object. You can for example use a variable vShowHide and use a button to toggle its value: =NOT $(vShowHide). Give it an initial value of 0 or -1. Then use for one chart the conditinal expression =$(vShowHide) and for the other =Not $(vShowHide).