To make things a bit easier, I have added a 'Quick Reply' mod to the board.
Ordinary, if you want to make a reply to a post you can look for the 'REPLY' button (which can be found in two places - up above the post or down below). OR you can use the 'Quick Reply' option which is the blank space box already showing under the post - so without having to click into 'Reply' you can just start typing straight away in that box - add your smilies or whatever from there - and when ready to post, just press 'Send'
You can do it either way - whichever suits you best.
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If you want to create a new topic anywhere, just click on the 'NEW TOPIC' button and where it says 'Title of the topic' , type in whatever you want it to be called, then the blank turquoisy coloured box is there ready for you to type in whatever you want - adding smilies etc if you want, and then when you're ready just click on the 'Send' box and your topic will be posted.
Also - you should find the answers to any of the questions you have on how to use the board by clicking into 'FAQ' at top of the board (where it's got 'Home' 'Portal' 'FAQ' 'Login/Logout'
FAQ stands for Frequently Asked Questions