I would just like to add an inputbox on a default modal of gantt

Gantt
#1

Hi would just like to add a custom/input box on a default gantt’s modal

Which is my project_id and set as hidden

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#2

image

#3

Hello,
In the following snippet you can see how I implemented 2 fields for the custom lightbox:
http://snippet.dhtmlx.com/87f9d9f6b

If you need something else, please clarify what you need and give me more details.