How to add horizontal line or area to line chart?

I have voltage chart, how to add to lines (maybe dotted line) to show litmit values it should be horizontal line on value 253 and second line on value 195.5 It would be great if I could mark the area in between, above and below them with different colors.
now its looks like this: https://i.imgur.com/JWxq1Sg.png and it should looks like this: https://i.imgur.com/oKKeLMR.png (not exactly but similarly :slight_smile: )

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