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diff --git a/docs/docs/intro-suggested-order.md b/docs/docs/intro-suggested-order.md
index 1489c18..2859e74 100644
--- a/docs/docs/intro-suggested-order.md
+++ b/docs/docs/intro-suggested-order.md
@@ -29,9 +29,7 @@ If you do not give a copy of the work order report to the Customer with the invo
 
 ## Invoice work orders
 
-- [Fix unlinked items](invoicing-fix-unlinked.md) on the Work order
-- [Fix Part price differences](invoicing-fix-price.md) between AyaNova and QuickBooks
-- [Invoice single or multiple](invoicing-single-vs-multiple.md) service Work orders to QuickBooks
+- [Invoicing](invoicing-howto.md) the Work orders
 - Confirm in QuickBooks that the service workorder information was invoiced out correctly
 - Confirm in AyaNova that the invoice number for the corresponding service workorder(s) was entered in Invoice #: field, service workorder set to closed, status set to that entered in preferences
 
diff --git a/docs/docs/invoicing-howto.md b/docs/docs/invoicing-howto.md
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--- a/docs/docs/invoicing-howto.md
+++ b/docs/docs/invoicing-howto.md
@@ -76,7 +76,45 @@ _Parmanent fix_ - this change survives restarting QBI before invoicing.
 
 ## Ready to invoice work orders
 
-The last work order in the list has no error icon and is [ready to be invoiced](invoicing-single-vs-multiple.md) now.
+Work orders displayed without a red error icon in their row header are ready to be invoiced.
+
+You must select the work orders you wish to invoice by clicking on the row header.
+
+An entire row must be selected, it is not sufficient to select a single cell in the table.
+
+Rows are selected by clicking on their row header:
+
+![select rows](img/main-invoice-grid-select-rows.png)
+
+Individual rows can be selected by holding down the Control key while clicking on each separate row to be selected.
+
+You can also click on a row selector and drag up or down to select mutltiple contiguous rows.
+
+If you simply want to select _all_ rows you can click on the header row selector at the top:
+
+![select all rows](img/main-invoice-grid-select-all.png)
+
+Problem work orders will not be attempted to be invoiced even if selected.
+
+You have two choices when invoicing you can invoice out one Work order per Invoice or combine multiple work orders for the same Customer into a single invoice per Customer:
+
+### Invoice multiple work orders per invoice
+
+To invoice all selected work orders for the same Customer to a single invoice choose the following menu item:
+
+![invoice multiple](img/main-menu-invoice-selected-multiple-item.png)
+
+QBI will use the least possible number of Invoices to invoice out all the selected Work orders that are ready for invoicing to their Customers.
+
+This means if there are 10 separate work orders for a single Customer a single Invoice will be created with the charges from all ten work orders.
+
+### Invoice one work order per invoice
+
+To invoice all selected work orders, each to their own individual separate invoice choose the following menu item:
+
+![invoice one](img/main-menu-invoice-selected-one-item.png)
+
+QBI will create one Invoice for each work order that is ready for invoicing.
 
 ## No invoiceable work orders found