Navigation — Multi-column drop-down menus

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Go to Appearance → Menus, select menu for editing
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You need select element for multicolumn

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and add next classes (you can add multiple classes like “.sub-col-3 .sub-full-width”)

Numbers of column

.sub-col-2

.sub-col-3

.sub-col-4

.sub-col-5

.sub-col-6

 

Size of dropdown menu

.sub-full-width

 

Align for dropdown menu

.sub-align-left

.sub-align-center

.sub-align-right