To enable show description in the pricing quotation, first ensure that the SKUs featured already have a description added as part as their SKU properties in the Admin portal. Then,
Enter the Pricing Quotation, by going to Production Tab and then Pricing Quotation in the Toolbar.
In the quotation that opens, select Settings icon in the toolbar.
In the window that opens, click on the Other Settings tab.
Under Customize Columns, click on the Show Description toggle to activate it.
Select Apply to apply changes.