I will often use ratios in my tables and I would like to be able to allow a user to point at a value/cell and see the tooltip of the numerator and denominator so they have a frame of reference rather...
In a standard matrix visual, I would like the ability to configure a simple text string as a tooltip for the column header of a Value. It is often useful the have the Value field name as a short-hand version so that it fits on the visual without taking up too much space. For example, I may add a Value from a Measure called "Total Internet Sales Excluding New Customers", but rename this Value to display in the matrix as "Repeat Sales". In order to give the user a simple way to remind themselves of the full description of the value, I would like the user to hover the mouse over the "Repeat Sales" column header, and have a tooltip display some text that I configure against the Value (for example "This is the Total Internet Sales, excluding customers that have placed their first order within the last 3 months")
