To make it center, we've added an extra field where you can add your own CSS code.
Go to the module backend, switch to Advanced Parameters and fill the Extra CSS field with this code :
top: 50%;
left: 50%;
margin-top: -25%;
margin-left: -25%;
Depending on your message type and the window size you can adjust the values to make a perfect center.
Article is in the following categories:
KB » Pro Sticky Message
KB » Pro Sticky Message
Knowledgebase
Can I center the floating window on page?

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