How to align points on the mesh to be parallel to the x axis

I’d like to align the line connecting two points on the mesh to be parallel to the x axis. Currently, the line is slightly off the x axis. Please tell me how to move both two points and the mesh at the same time so that the line connecting the two points is aligned with the x-axis.

Orient command
https://docs.mcneel.com/rhino/8/help/en-us/index.htm#commands/orient.htm

Hello- Orient or Rotate, you’ll need the Vertex OSnap, and then Ortho on for the target point.

-Pascal

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