Combine several listings into one product

New to nop. Taking over existing website. There are individual products with variants that I would like to list as one product. For example, if I had a pencil that came in red, white and blue, the is one listing for red, one for white and one for blue. I am trying to merge these into one group category for the pencil, and have the red, white, and blue be my variants. I know how to do this if I started from scratch, but am hoping there is a way to preserve some of the work that has already been done.
Thanks!

I guess what you need is a grouped product (pencil) with variants (colors) or a single product with color attributes: https://www.nopcommerce.com/boards/t/10330/setup-single-product-with-multiple-variation.aspx

Thanks for the quick response! It's close but not quite. I want to know if I can take products already set up that way and change them from a product to variants for a new product. Is there a way to group them under one "master" product so I don't have to re-enter all of the data fields again as variants to my new product. So "Pencil" would be the new product and the variants would be the 3 colors using the existing product listings. The difference between what I'm thinking and the link is that the variants are already existing products and it makes my site look messy with 3 listings of almost the exact same thing. Sorry if I'm not explaining myself very well.

M.Smith wrote:
Yes. For a pencil, just create (in Advanced mode)  one grouped (master) product (it can be a copy of one of your existing pencils) but Product Type= Grouped product and then associate to it the rest of the existing pencils.

Something similar can be done with product attributes: one product with attributes (colors) and associating the pencils as attribute values.

Very helpful. Thanks. You not only answered my question, but in reviewing your response, it became obvious I need to upgrade. I'm on 2.4. Yikes.