Where are screen tips defined?

[halkosj]

We have several dimensions where the descriptive columns contain descriptions which are too long to display nicely in the tree view (e.g. in Report Studio).  So instead, we display the "code" instead of the description.

But the codes are not always meaningful, so we want to define a screen tip - when the user hovers the mouse over one of these "codes", it should pop-up the long description.

By default, the screen tip content is the same as the item you're hovering over. For example, in a hierarchy of US States, hovering over CA should pop up "California".  Instead, the pop-up is "CA" - which is not very useful.

Where in Transformer are these screen tips defined?