My weather display is to small

Im not sure how to make this fill my 43in 1080P screen which I have a screen resolution set for 4k the picture looks pretty good

Well now I have a Samsung 40in 4k tv the picture while using it as my monitor is awesome but I still have the same issue as with the 43in 1080p tv my weather station display is only showing up in the upper left corner of the display and the rest is all white cant figure out how to increase the size to utilize the full display.