Dual axes: nice formatting

Data

Dual axes: nice formatting

by Andy Cotgreave
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You’ve built a nice chart using synchronised dual axes (maybe it’s a lollipop chart – as described in my previous posts!). It looks great, but you’re just left with a niggling little design flaw: those dual axis sure take up a lot of space, at the top and the bottom of your viz:

What can we do about this? The first thing I thought of was to format all the Tick Marks and Titles away from the top axis:

That’s no good – there’s a huge useless white banner of dead space at the top of the chart now.

Instead, why not just format each axis to show one of the important parts: one to show the title and one to show the tick marks? This is the end result:

Now I have the best of both worlds – the user’s not aware of any dead space, and nothing gets repeated. To format the axis, right-click anywhere on the axis on the worksheet and choose Edit axis…

On the top axis, leave the Title as it is, and show just the Minor tick marks, making sure they are the same interval as the Major tick marks on the bottom axis:

:

On the bottom axis, leave the tick marks, and delete the Title:

Job done! You’ve maximised your available space and made your users’ lives a bit easier.

More About the Author

Andy Cotgreave

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