It depends on the forum, loopyloo, some forums do not allow clickable links. Usually they will tell you how to do it, on their particular forum, in their help files. If you tell us which forum it is, we could be more specific.
Samsung Galaxy S9 review
Wacom Cintiq Pro 24 and 32 review – hands-on
When is the next Apple event?
Qu’est-ce qu’Amazon Prime ?