Hi Volker,
Greetings from Syncfusion support.
We have analyzed your query and would like to inform that, it wasn’t
possible and didn’t have support for resize grid height size using mouse navigations.
So, we suggest you to set the grid
height responsively based on the browser resolution. For this we suggest you to
set the grid height as 100% and specify the grid’s parent element to have
explicit height. Kindly refer the attached documentation for your
reference.
Reference: https://blazor.syncfusion.com/documentation/datagrid/scrolling#responsive-with-parent-container
Kindly get back to us if you have any concern
Regards,
Sarveswaran PK