read more help ?

i have posted some posts but i was just wonding if theres a way to add a read more button.

so if you look under the Tips for new starters , i have a section of posts and ofcourse it cuts half there text off is there a way to add a read more button on them but that dosnt display on the page its self when reading the artical ect ?

i see theres a read more tag i think you call it ? but that dosnt seem to work

The page I need help with: [log in to see the link]