Have a tree-select editor?

Gantt
#1

in the select-editor,just like 6H%5B%25(Y%7BUPKD%40~SU9WW9BO1E
i want more select,like 1PRHPDA%5D~ULJEIY2~%7BXXFH6 how to it?

#2

Hello,
Gantt uses the input element with the select type for the built-in select_control section:

https://docs.dhtmlx.com/gantt/desktop__select.html

If you want to add something different, you need to use a custom section and implement a custom solution or use a 3rd-party library to show custom HTML elements:
https://docs.dhtmlx.com/gantt/desktop__custom_editor.html

I have the following examples that will help you to start:
http://snippet.dhtmlx.com/9a455dede
https://snippet.dhtmlx.com/5/248e7a34f
http://snippet.dhtmlx.com/5/759755a2a