Line Markers, Axes and Grids

Lines, bars and markers — Matplotlib 3.8.2 documentation

Matplotlib Adding Grid Lines

Configuring Major Ticks and Grid Lines – Logi Analytics

ScottPlot 5.0 Cookbook

The Magic of Matplotlib Stylesheets

Help Online - Quick Help - FAQ-621 How can I put a straight line to a graph at specified X or Y value?

javascript - Plugin for custom horizontal line Y-axis marker on grid of a Line chart with Chart.js - Stack Overflow

Power BI - Format Line and Clustered Column Chart - GeeksforGeeks

Text Markers, Axes and Grids