First go here.
R-A-I-N wrote:eto... how to change the background?
There you can select a template one or create your own from scratch and upload it with the button below thats saying Configure in the section Custom signature:.
By editing the number values in the input field you can change the output positioning, for more information about the values, hover over the tags above the input field there.
Edit: @Oinari-sama you can already see it in the very first [Info] output, but I will put it somewhere else as well.