Francisco...........
Since the CMDB Visualizer relies completely on Adobe Flash Technology, certain customization of the CMDB Visualizer interface is currently not possible.
There is an Idea posted on the CA Service Management Community regarding rebuilding of the CMDB Visualizer with a modern technology (i.e. HTML5).
Here is a link to the Idea:
Rebuild of CMDB Visualizer on modern technology like HTML5
If this feature is important to you, I encourage you to vote for the Idea and provide your commentary.