Do you want to add sticky effect to the primary navigation menu in Flex Pro theme? With few lines of code you can easily achieve this.
End result: when you scroll down, the primary menu bar will automatically stick to top of the page.
Step 1: Add the following code in style.css file (above the media queries section).
Step 2: Then add the following JS script code in global.js file located in the js folder of flex theme.
See Demo below