Hello,

Following is an example on implementing custom Expand/Collapse column with customizable content (icons) and even different position of the column:

• https://stackblitz.com/edit/react-eh2ndd-7jskr9?file=app%2Fmain.jsx,app%2FCustomExpandCell.jsx

Regards,
Konstantin Dikov
Progress Telerik

Hello,

Just sharing the current approach for changing the expand/collapse icons with CSS:

• https://stackblitz.com/edit/react-eh2ndd-ccz4mg?file=index.html

            <style>
            .k-grid .k-hierarchy-cell .k-i-plus:before{ 
                content: "\e005";
            }
            .k-grid .k-hierarchy-cell .k-i-minus:before{
                content: "\e006";
            } 

Regards,
Konstantin Dikov
Progress Telerik