Fixed menu at the top

[Felix]

No need for plugin, you can do this with simple css

To create a fixed top menu, use position:fixed and top:0.

Note that the fixed menu will overlay your other content,
so, add a margin-top (to the content) that is equal or larger
than the height of your menu.

Starting css example:

.navbar {
  overflow: hidden;
  background-color: #333;
  position: fixed;
  top: 0;
  width: 100%;
}