First time lay

So what you're saying is, you've backed something at odds of 80/1, and now the odds have dropped to 25/1 and you want to lay t guarantee a profit regardless of outcome?

If you lay at backers stake of 32, you'd have a green screen.

Is that what you were asking?

Play around with the figures yourself before yu submit the bet, making sure you've ticked the "Display what if figure" in your options