This forum is for posts that might be considered off-topic but that may be useful or interesting to members. Examples include posts about electronics or programming in general, other microcontrollers or interesting devices, useful websites, etc.
Before the right square bracket of the opening url tag, simply insert an equal sign followed by the actual URL. When you're composing the message body, this syntax is shown below the font color and font size controls (above the edit box) when you move the mouse over the URL button.