Is it possible to customize apex page messages in visualforce?

Question

I basically want to change the title of the box showing the mes

Is it possible in an official way to change those titles? Or do I have to write custom html to accomplish that? I didn't find relevant information on this. Thank you!

Answer 1

For <apex:pageMessages> it is not possible. The component is presented using "Salesforce styling", and it does not expose a "title" attribute, as stated in the documentation.

<apex:pageMessage>, however, can have its "title" (the title text for the message) modified.