How to Use Custom "Order" Field

-- HikaShop version -- : 2.61
-- Joomla version -- : 3.45

The client would like to add a product automatically during checkout. The product allows customers to make an optional donation to the cause. I've tried several approaches, but none were ideal. Reading the forum, it appears that I can create a custom "Order" field. I can configure it to load my donation product. And then it should appear in the checkout screen, provided that I add the field to the sequence. It should become visible in the drag-and-drop fields at the top of the checkout configuration window.
First question: Am I correct?
Second question: Can I create two "Order" custom fields, one on top of the other? The first field would have a text message explaining the option to donate to the cause. The second field would contain the product for addition to the cart.
Thank you as always for the great system,
-Jim G.

Thank you. I think I should have been more clear. What we want to do: simply display this optional product via an order field. The customer would still have to manually add to cart. It is an optional additional purchase which we want to display. Almost like a related product. You might think of this as a related product for ALL products in the entire store.
-Jim Gribble

So, if I understand, the basic format is something like this: {product}1|name|pricedis3|pricetax1{/product} And I would insert it into the custom text field?
Seems clear enough, but in the documentation what is the purpose of the numeral 1? I see that that the fieldnames are separated by simple vertical slashes. Why is that numeral 1 there? What does it do?
Thank you,
-Jim G.

Thanks, now I see and understand how it works. When you add a product, instead of being based on product name, it uses the product number which is assigned automatically. I can see how this will be very handy. (I was expecting to see product name show up in the code.)
-Jim Gribble

So, I seem to have solved my problem with a custom text field assigned to all my product categories. On checkout, the custom field appears just before "finish." Which is perfect. Maybe you should explain in documentation is that this is an HTML field which can be coded in a variety of ways. I added a graphic for example via external URL; and a hyperlink to my "donate" product. There's is only one thing I'm unhappy about: position of the custom field label off to the left side of the custom text. It looks like a mistake. I would like to have it on top of even not show it. There is no such option in the control screen, and it's very difficult to see the CSS code that's driving this alignment. It seems to be a form label and to change that CSS could change many other things haphazardly. I am attaching a screen shot and asking your advice.
Thanks again,
-Jim Gribble

Never mind; I just discovered that the label is optional. I left it blank and it doesn't show and the form looks fine. Always something new to discover.