Hi Stefan,
Thank you for your interest in Syncfusion products.
I am afraid that I could not reproduce the height issue. The attached sample contains three buttons and two controls.Depending on the button selected the contol performs the action specified.
Please download the attached sample from the following link:
http://websamples.syncfusion.com/samples/Tools.Windows/F70853/main.htm I have also attached the video sample for your reference and it is available in the following link:
http://www.syncfusion.com/support/user/uploads/Video_8fc37714.zip If still any issue exists please modify the sample or elaborate the reproduce steps.
Could you tell me the version number you are using?
Regards,
Pavan K.