I hope you can help me with my problem.

I have a report with a bar chart, created with Pentaho Report Designer 3.9.0. The Y-axis-range and the interval for helping lines is set automatically by Pentaho. To see the automatic result I attached a litte screenshot.

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My problem is that I want the y-axis-range to be higher, so that there is an interval with one helping line above my highest y-value.
In the example the range should be 0-100. So that the helping line on top is higher than my highest value.
There I have also attached a screenshot (with a fix setting of the range to 0-100)

Name:  report2.jpg
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But i can't set the range fix to 0-100, because the range of my values differs a lot.

What can i do ?
Is there an option like "make on interval more ..." ? :-)