Hello Evgeni,
Regarding your inquiries, you can read the respective online readings on the issues. There is no exact option to set the width out-of-the-box. But RadChart offers many other ways to format the labes so that you can achieve readable results. Here is the
online topic regarding labels. Also, you can give a look on the
online reading for tooltips.
Regards,
Rosko
the Telerik team
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