How to add / remove a button on the Issue form in Jira?

Question

JIRA

As a result of installing and configuring the WBS Gantt-Chart plugin for Jira, an additional Create Task button appeared in the Issue form. She is redundant in this form. Who worked with setting up forms, tell me, please, where to dig.

Answer 1

It looks like this button is enabled by one of the WBS Gantt-Chart plugins. They didn’t look for which ones, they simply turned off the plugin completely, because. by itself, it is quite slow, it takes a long time to create a project structure in it, a lot of unnecessary tasks are created (all group ones), etc. Therefore, we decided to switch to a bunch of MS Project + Jira through Ceptah Bridge.
So the question is no longer relevant.

Answer 2

If relevant,
then there are Screen forms, for each project, action and task type - you can customize.
At the extreme javascript, assign the hidden method for a specific project,
run through the announcent banner