Application Express 5.0.3.00.03

I simply want to vertically compact the set of rows displayed in a Standard Report to save screen real estate.

I will probably need to change the font height (which i have done before in APEX 4.1 using custom CSS properties).  I believe that the default template is auto-fitting the row height (and width) to the font-size and data content including the "cell padding" values in use at the time the table row data elementa are rendered .

However, how can I override this row/cell sizing to achieve the "compacted" look, granted at the potential sake of human-readability?

I am using the "Universal" theme, and the "Standard Report" Template for the region definition.

I Googled until I gave up...

I've also looked at the Type:"Report" Name:"Standard" template's "template options"  after having "Unsubscribed"   the template from the Universal theme to allow for template editing.

Is this done by create a new "Template Option" which refers to an existing or new "CSS class"?

if so, how does one get the list of existing CSS classes and what they each do and what attributes can be set for each of them?

Sorry in advance for my ignorance.  This seems like it would be a simple thing to do, but I am stumped.