Hello, @lordzz!
Ted here from Shopify, thanks for reaching out to us. :-)
It sounds like you may have created a few collections that have both male and female products within the collection. Instead, to have a page with all of your products listed but specific to men or women, it's best to create 2 new collections specifically for the main menu.
Have you created 2 new collections for this? If not, I'd recommend editing to your products and adding a "Women" and "Men" tag to each product, to help create an automatic collection as shown here. This way, you won't need to manually add the products to the collection every time and system will automatically add the product (to the collection) for you as long as it's tagged. It will save you time in the future for sure. If you have a lot of products to tag, you can edit your products in bulk via the Bulk Editor as shown here.
When creating the first automatic collection, you could set a rule/condition to say that any product with the tag "Women" goes into that collection. The same can be done for the second collection, only you would be creating the rule/condition to tag products with "Men" instead.
After that, you should click Online Store > Navigation > Main Menu in your admin as shown here. Now, edit one of the main menu titles. Make sure to remove "All Collections" if it has been assigned and instead add one of the new collections you have just created.
This startup video might be of use as well if you would like to take a look.
Please let me know how this goes and feel free to reach out to our Support team any time as well. We're here 24/7 via Facebook, Twitter, chats, emails and phone. Just click 'talk to support’ for some more info.
Thanks a mill,
Ted
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