I want to modify the left toolbar. What can I do

For example, I want to change to a user’s tool on the vertical tool, how should I change =, where can I modify my code, or have detailed documentation, please help me, thank you.It is the first time for me to contact BPMN, do you have any good Suggestions, or reading relevant documents to help me better understand it, instead of directly looking at the BPMNJS code, can you provide me with such helpimage

Our examples are a good starting point for that. Specifically, this example shows how to modify the Palette, which is the component you mean.

Hi, I want to modify the id attribute of the root node process. How can I modify it?

Please do not necrobump old topics. Instead link to this thread from new topic, if your question relates to it.