Defining variable to be used in few places

Is there a functionality in Tabluau to create a variable that can be used in few places by referring to its name? I'm asking because I need to prepare a dashboard and the data loaded and displayed on the dashboard can contain two different variables in column called value. So I would need to define such a 'variable' that would be filled with the type of value column (ex. type 1 or type 2) and use it as a axis name, in a tooltip etc. Of course, I'm trying to avoid a necessity to change all the axis names and tooltips manually.