Hi, Tom Conlon
The screenshot shows one series named “Lst3,” but each marker has a different color and appears separately in the legend. This usually happens when Vary colors by point is enabled, so the series setup itself is not the problem.
Here are some suggestions you can try:
Click any plotted point once, so all three points are selected.
Right-click and choose Format Data Series.
In the formatting pane, open Fill & Line > Marker > Fill.
Clear Vary colors by point. All markers should return to one color, and the legend should show only the series name, “Lst3.”
If that option is not visible, change the chart temporarily to another XY Scatter subtype, such as Scatter with Straight Lines and Markers, clear Vary colors by point, and then switch back to the original scatter subtype.
As a fallback, remove the automatic legend and insert a small text box containing “Lst3,” with a matching marker shape beside it. This does not repair the chart behavior, but it provides a clean legend without changing the plotted data.
Thank you for your patience in reading, I hope this information has been helpful to you.
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