Customized task types in gantt

SIR. I know TASK, PROJECT , AND MILESTONES are the default tasktypes in gantt. i want to customize it. i dont to change that task type name to something else . is it possibile? i dont want to display task,milestones,and project in the drop down list type. i want to replace them by my own names.

If I’m not wrong, only PRO version and above can do that.
Open-source does not allow for custom task type.

I’m having paid pro version. I need help

Hello Amal,
If you want to show different task type names in the lightbox, you can change that in the gantt.locale.labels variable:
https://docs.dhtmlx.com/gantt/api__gantt_locale_other.html
Here is an example of how it works:

http://snippet.dhtmlx.com/f590fbe98

If you want to change more than just names, you need to apply more modifications. The following article explains what you need to change:
https://docs.dhtmlx.com/gantt/desktop__task_types.html#creatingacustomtype
And here is the sample with the custom task type:
https://docs.dhtmlx.com/gantt/samples/04_customization/12_custom_task_type.html