open your chat.php file chat being the name of the file u use to launch the chat from your browser.
$params["height"] = "500px"; where the 500 is the height and can be changed to whatever height you want the chat to be .
I put the height config after the title param and it seems to work fine .
At the moment the only value the height param will accept seems to be px ( pixels) , if you try using percent % or any other unit the height might not work .
Is where parameter's start. You're setting the variable "params" to an empty array. If you set anything before it (which is what you did) those values get cleared out when it's set to an empty array.
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