I would like to improve the readability of the label on charts.

At the moment there look like this


download bmml source – Wireframes created with Balsamiq Mockups

What is the best placement and orientation for chart label that offers a good readability and avoids wasting too much space ?


Another alternative for the Y axis label suggested by statistician Naomi Robbins is to place the label above the Y axis. This has the advantage of not having to read the vertical text and does not waste as much space. See the example in the top right chart.

IMO the non-centered X axis in your mock up looks fine to me.


I think that it's pretty standard to place an axis label centered with respect to the corresponding axis.

So, your chart's Y axis label looks fine to me, but the X axis label should be centered, in my opinion.

  • 1
    thank you for your reply but the vertical text bother me because it is difficult to read. I am looking a different solution.
    – Renaud
    Jul 17 '14 at 10:19
  • @Renaud: You're welcome! I can think of several alternatives to vertical text, including call-out, sometimes referred to as annotation, for each line (placed inside the chart area) or color-coded lines with legend to the right of the chart. Jul 17 '14 at 11:00

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