Option to open main menu category and have drop down menu enabled only when you click on down arrow?

[okmarzo]

On my top main navigation I have 5 main categories and each parent category has drop down menu consisting of few other sub categories. At this moment when I click on the main parent category it automatically enables the drop down menu.

I want to user to be able to view the whole page including all the sub categories when they click on the main and if the user wants to use the drop down menu, they would just click the "Down" arrow.

Is there an easy way to have these two functions?

[KetanKumar]

@okmarzo 

Sorry for facing this issue, it's my pleasure to help us.

Welcome to the Shopify community!
and Thanks for your Good question.

Please share your site URL,
So I will check and provide a solution here.

[okmarzo]

Thank you for replying.

My website is not open to the public yet but I took some screenshots.

Image 1: Click on "Pre-orders" 
Image 2: Drop menu expands when I click on "Pre-orders"
Image 3: I want "Pre-orders" page to open and have drop menu to expand only when I click on "Down" arrow.

Right now drop menu expands if I click on "Pre-orders" word and the "Down" arrow no matter what.