This can be done by editing the template, and adding some CSS.
1. Go to Control Panel > Templates > TopicsView
2. Locate the [STARTEDBY] tokens (there will be two) and add a span element around it:
<span class="afstartedby">[STARTEDBY]</span>
3. Save the template.
4. Go to Control Panel > Forums and click the name of the forum (or group if you use inherit group settings)
5. Change the Topics Display template to TopicsView
6. Go to the DesktopModules/ActiveForums/themes/{current theme name}/module.css (You can see the current theme on the Control Panel > Settings page)
7. Add this line to the bottom of the file:
span.afstartedby a, span.afstartedby a:link, span.afstartedby a:visited, span.afstartedby a:active, span.afstartedby a:hover{size: 8px;color:#000;font-weight:normal;} 8. Save
9. Go to DNN Host > Host Settings > Restart application
10. Check the page, and change the CSS if you want.