Dropdown menu with multiple options

[epok]

Hi,

i'm using Joomla 3.9.1 and VirtueMart 3.4.2

Assume to have a product with the following custom fields as product variant selection:
- extra topping A (+0,5 EUR)
- extra topping B (+0,5 EUR)
- extra topping C (+0,5 EUR)

I see the three options in the dropdown menu and I'm able to select only one option.
I would like to have a dropdown menu with multiple options: for example select the product and then A and B extra toppings by using only one dropdown.
Is it possible?
Thanks to all.

[Studio 42]

Not very clear for me.
But you can use a main product and generic child variant for eg and set dropdown A,B,C in the child ?

[hellorain]

Hello,

Yes, it can be possible with customization.

Best Regards,
hellorain.

[epok]

Sorry, if the question is not very clear.
My goal is to configure a product cart variant quickly and easily without need for child products.
So, I have a "base" product: the user is able to choice it or to add one or more extra attributes that change the price of the product.
I'm using this extension (http://forum.virtuemart.net/index.php?topic=127362.0): great but I miss one thing.
How to select one or more attributes by usign only one dropdown menu?
I posted an image for better explanation.

[balai]

Please check the Custom Fields For All
https://breakdesigns.net/extensions/joomla/custom-fields-for-all

There is a multi-select feature.
Not using a drop-down but buttons or checkboxes. Possibly this is even better.