Lines under or above the altitude restrictions

Hi all, new to navigraph recently. What do the lines under the altitudes mean. Getting confused between, above, or below. Thanks
Screenshot 2022-03-20 173418
Screenshot 2022-03-20 173405

Hi,

  • the line under the altitude = “at or above” altitude
    image

  • the line above the altitude = “at or below” altitude
    image

  • the line above and under with one altitude = “at” altitude
    image

  • the line above and under with two altitudes = “at or above to at or below” (read from bottom to top)
    image

Hope that helps,
Richard

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