Bitrix, a question about categories?

Question

1C-Bitrix

Hi guys.

Question. How do you do if the product should be in different categories?

For example, the product "toy watch". It must be in a category. Watches, accessories, for girls and a gift.
The product is in 4 categories, how do you do it, through the link to the category in the product properties or just indicate the necessary categories in the list of product catalogs??