you should have the tools now… 😉

using your browser, right click on the piece you want to change and click on inspect…  you will be shown the css that is controlling that piece of display… then you can take that css and copy it into the theme custom css that you just did..

for example, for the post content, you would see the styles as:

#spMainContainer .spTopicPostSection .spPostSection, #spMainContainer .spTopicPostSection .spPostSection .spPostContentSection .spPostContent p {
font-size: 1 em;
}

now you may have more styles in there than just font size (theme specific) but that is the one you want to change…  it might be specified in pt, px or em…  just increase the size until happy…

dont forget to clear browser cache…

also, if you generally want to increase the font size, you could try:

#spMainContainer {font-size: 110%;}

where you can experiment with 110%…  now that latter method may not work in all themes and may not increase everything depending on how explicit some styling is…

another option would be our font size plugin… it provides an api for each user to increase the overall font size of their forum… its remembered each time the user visits the forum… you can see it in use here at the very top of our forum where you will see three letter A… little one makes it smaller, big one makes it bigger and the middle one resets it…