To disable 'delete' in header document and enable 'delete' in line document

Hello, is anyone able to provide more insight on this? I am looking to make a very similar change, but on Sales Orders and Purchase Orders screens rather than ‘Cash Entry’ screen.

I had my implementation company help with setting this up, however they set it so that “Delete” has been disabled across everything (both header and line-level). I would like to re-enable users to “Delete” at the line-level, but I cannot tell which Access Rights drop-down I should be selecting from, since the screenshots on this thread are cut-off. I have tried searching within these screens, but only seem to be able to find the “Delete” Access Right on the “Sales Orders” itself, not within the “Sales Orders Lines” (at the line-item level). I would like to learn how to do this in-house as our implementation company has not been the best recently. We are running on 2021R2 Build 21.216.0034

Knowing which Access Rights supersedes the others would help as well, as we have Access Rights customized across both Roles, Users, and now Screens as well.

Thank you all in advance.

We just hid the Actions more dynamically using a rowSelected Event 

namespace PX.Objects.AP
{
    public class APInvoiceEntry_Extension : PXGraphExtension<PX.Objects.AP.APInvoiceEntry>
    {
        #region Event Handlers

        protected void APInvoice_RowSelected(PXCache cache, PXRowSelectedEventArgs e, PXRowSelected InvokeBaseHandler)
        {
            InvokeBaseHandler(cache, e);

            var row = (APInvoice)e.Row;
            var hideActions = false;
            var hideApprovals = false;

            foreach (UsersInRoles role in PXSelect<UsersInRoles, Where<UsersInRoles.username, Equal<Current<AccessInfo.userName>>>>.Select(Base))
            {
                if (role.Rolename == "Project Manager")
                {
                    hideActions = true;
                }
            }

            foreach (UsersInRoles role in PXSelect<UsersInRoles, Where<UsersInRoles.username, Equal<Current<AccessInfo.userName>>>>.Select(Base))
            {
                if (role.Rolename == "Project Accountant")
                {
                    hideApprovals = true;
                }
            }

            if (hideApprovals == true)
            {
                if (Base.Actions["approve"].IsNotNull())
                {
                    Base.Actions["approve"].SetVisible(false);
                }

                if (Base.Actions["reject"].IsNotNull())
                {
                    Base.Actions["reject"].SetVisible(false);
                }
            }

            if (hideActions == true)
            {
                Base.Cancel.SetVisible(false);
                Base.Next.SetVisible(false);
                Base.First.SetVisible(false);
                Base.Previous.SetVisible(false);
                Base.Last.SetVisible(false);
                Base.Insert.SetVisible(false);
                Base.CopyPaste.SetVisible(false);
                Base.putOnHold.SetVisible(false);
                Base.releaseFromHold.SetVisible(false);
                Base.release.SetVisible(false);
                Base.payInvoice.SetVisible(false);
                Base.editVendor.SetVisible(false);
                Base.Delete.SetVisible(false);
                Base.vendorDocuments.SetVisible(false);
                Base.printAPEdit.SetVisible(false);
                Base.printAPRegister.SetVisible(false);
                Base.reclassifyBatch.SetVisible(false);
                Base.createSchedule.SetVisible(false);
                Base.recalculateDiscountsAction.SetVisible(false);
                Base.reverseInvoice.SetVisible(false);
                Base.Actions["releaseRetainage"].SetVisible(false);
                Base.Actions["reclassify"].SetVisible(false);

                if (Base.Actions["saveCloseToList"].IsNotNull())
                {
                    Base.Actions["saveCloseToList"].SetVisible(false);
                }

                if (Base.Actions["cancelCloseToList"].IsNotNull())
                {
                    Base.Actions["cancelCloseToList"].SetVisible(false);
                }
            }
        }
        #endregion
    }
}