Settings needed to see troughs on map?

[geoff 0]

G’Day, anyone know the setting I need to be able to see troughs on my weather map?

[idefix37]

@geoff-0
Hello,
At surface level a trough is shown by pressure isolines (isobars)
At higher level in the menu if you switch to isolines of geopotential heights you can set them with the Altitude slider at 500hPa for instance.
Example in the mobile app