To activate the Mega Menu in your store, please follow the following steps:
1. From Online Store, select Navigation and select the main menu.
2. The list should have 3 levels, such as the example:
3. To add an image to the listing, upload the image in your store in Content > Files. Then paste the link obtained in the list as follows: text | link
4. Go to Online Stoer > Customize and choose Header. Select Mega Menu type from Desktop Menu Type