Hi Domenico Mozzone,
Thanks for your interest in Syncfusion products.
The issue "The port is added to the custom symbol, but size does not changes" reported by you has been Suspected to be a defect. Please create a DT incident for your query so that we can update the patch for this issue.
You can create the DT incident from the following link.
<
http://www.syncfusion.com/account/dashboard>In the interests of maintaining confidentiality, we have a policy of not sharing patches or otherwise proprietary customer specific information in the public Forum.
Please let us know if you have any queries.
Regards,
Senthilkumar.M