This question was asked, "I want to make the main title for each listing on my Forum and Events, larger. And I only want to change this on my home page."

If you want to make the Forum and Event Titles (the link) larger, the following styles should do it.

Forum Thread Titles:
.xg_widget_main .module_forum h3 a {font-size:1.25em;}

Event Thread Titles:
.xg_widget_main .module_events h3 a {font-size:1.25em;}

Just change the font-size to suit your needs.

• Adjust the font size to suit your needs. I'm using 125% (1.25em) in examples. You can use % or font size like: 16px
• When you're ready, add to bottom of CSS via Manage/Appearance/Advanced CSS.
• Save your code.

Here is a screen shot of the Forum Listing Titles. I made it very large for the example.