Decrease header font size

Hello good morning! I need to decrease the font size of the module gk_image_show. But I have not succeeded. How do I change this?

Thank´s

Hi, can I start by The Doors lyrics

Hello , ....
Let me jump in your game

Sure, first method: you have to overwrite stylesheets.
Second,...
it deepens what kind of content you use.
Because if you use "Content type: Text" in "Content" field you can easily use :

Code: Select all

<span style="font-size:39px;">BIG Letters</span> 

inside