Add new service(button) in selling quoation.(item table)

hello Dear

i am new developer in ERPNext need some help.

how to add new button in selling quotation (item table).
with item group=“service” , only service add this button.

Client Requirement

  1. Publish plan
    1.1 Estimate
    1.2 Quotation
    1.3 Negotiation
    1.4 Sales Order and Project Creation

Thank You

You can do it by adding a new Item (that feature already exists in the Item dropdown)

how to cover this point in ERPnext

  1. Publish plan
    1.1 Estimate
    1.2 Quotation
    1.3 Negotiation
    1.4 Sales Order and Project Creation