Should toggle buttons show what they do or the system status? [duplicate]

1. What does a toggle button do in Excel?
2. Should toggle buttons show current state?
3. What is the purpose of toggle button?

What does a toggle button do in Excel?

Toggle buttons indicate a state between an enabled or disabled state when the button is clicked. To add an ActiveX control, you'll need the Developer tab on your Ribbon.

Should toggle buttons show current state?

Usability tip: If the toggle is an action (Play/Pause) the label / title should show what will happen. If the toggle is an option (On/Off) then it should show the current state.

What is the purpose of toggle button?

A toggle button allows the user to change a setting between two states. You can add a basic toggle button to your layout with the ToggleButton object. Android 4.0 (API level 14) introduces another kind of toggle button called a switch that provides a slider control, which you can add with a Switch object.