Displaying negative value with Nextion Display

Anybody managed to create a little trick to display negative numbers on Nextion display? I made a very nice thermometer based on a Nextion display, the last problem I need to solve is how to represent negative temperature on my gauge? I can show temperatures up to 0 degrees C. If I just use Fahrenheit it would be -17.5 Celsius (already enough) but I want people to be able to display C or F... For C I really need a - sign to appear.

Hello.

I've been using the Nextion displays for a while and I very quickly learnt not to use the numbers. If you want to display a number use a text box and send the number to the display as text. That way you can have any number you like, not just positive integers.