I've often wondered what is the recommended item to emphasize -- the item label or the item value -- when you want to draw a user's attention to a specific piece of information. For example, our application has a confirmation dialog after booking an order that contains the confirmation number for the order. It's often important for the user to make note of the confirmation number for subsequent use -- e.g. communication to the client; data look-up; etc.
The application currently shows the dialog with the label highlighted as follows:
An alternative would be to highlight the confirmation number itself:
I've always felt the former approach was preferred because it's more scannable -- it help's the user find the confirmation number but the latter approach I've seen often also and it makes the order number itself stand out better once it has been identified.
Another consideration is would the same practices apply if there was more than one item needing to be emphasized.
Any best practices here?