I'm trying to add a "New" button to the Resource Plan related list on the Demand form, but I'm running into issues. The form currently includes the out-of-the-box (OOTB) Resource Plan related list, but it doesn't have any list controls available.
To work around this, I attempted to create a new related list called Resource PlanV by establishing a relationship between the Demand and Resource Plan tables. However, when I try to create a list control for this new related list, the form doesn't allow me to edit the "Related List" or "Table" fields—they're locked or non-editable.
Could you please help me resolve this or suggest an alternative approach?
