Hi @nj128534
There is no direct way to format the thickness of the line in a line chart in PowerApps, but you can use a workaround by using a rectangle icon and setting its height or width to zero and its border thickness to the desired value. You can also use a variable to control the color and border thickness of the line.
To add a background color to the line chart, you can use the Fill property of the chart control and set it to any color you want. For example, you can use Color.Red.
If you have any questions or feedback, please let me know. Have a great day! 😊
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