Do I have to continuously repeat certain elements for them to appear on all documents [I'm fairly new]

So basically, I have a generic top navigation bar that shows where you can go.

ex. Top left = "Title" -some space between it- Other Site

Is it possible for me to type the top nav code in one area for it to forever stay in that area. I have opened up a couple of new documents so it's getting pretty repetitive at this point.

In summary, is there a feature/special thing I can do or do I just have to suck it up and continue the way I'm doing it?