Hi Jim
Thanks for using Syncfusion products.
Currently we don’t have support to dynamically change the selection handlers as the diagram is zoomed. We have confirmed this as a feature and logged a report on this. Also we have created a support incident under your account to track the status of this issue.
Please log on to our support website to check for further updates.
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents
Please let me know if you have any questions.
Regards,
Shyam G