Hi victor,
Thank you for your interest in Syncfusion products.
Your requirement of setting ‘Window’ control to the middle of the page even when there is page scrolling can be done by calculating the scrollTop position of the document and height of the window control. Then set the values to the ‘Window’ controls ‘Top’ position. Please refer the below code snippet to achieve this,
[JavaScript]
Kindly let me know whether I have misunderstood your query.
I have also prepared a simple sample which can be downloaded from the below link,
978041856627114.zipKindly try this and let me know your concerns.
Regards,
Varalakshmi.R.S