Auto display hint when text is too long

[realsol]

I am trying to figure out the best way, if even possible, to display a hint when a user hovers above a row/column whose text is too long to display all the text within the column. Is this possible and if so, could you give me an example?

[Yeray]

Hello,

when a user hovers above a row/column

I'm not sure to understand what kind of Chart do you have here.
Arranging and attaching a simple example uses to make things clearer.