It will show main headings in the document. You can then click on them to jump to that part of the document. This is much faster than scrolling up and down through the document.
For navigation
The pronoun 'that' is functioning as a relative pronoun, introducing the relative clause 'that will be most useful'.The relative clause is providing information 'relating' to its antecedent, 'documents'.
Written documents are useful in setting up a government because it is like proof.
written documents are useful because they allow the government to have proof of laws and agreements.
To print documents.
Compass
Navigation and migration .
these
The Tab key on an Apple keyboard is used to create horizontal space between elements, typically for navigation within applications or documents. It allows users to move the cursor to the next tab stop, which is useful for organizing text in columns or for navigating through form fields. In many applications, pressing the Tab key can also cycle through different interface elements, enhancing workflow efficiency.
Planets move across the sky over time, making their positions constantly change, which makes them unreliable as fixed points of reference for navigation. Additionally, planets can only be seen at certain times and locations depending on their orbits, limiting their usefulness as a navigational aid compared to more constant reference points like stars.
Rivers in Europe are useful for internal navigation because they do not have sudden breaks and connect various towns and cities.
It is useful because it is directly above Earth's north pole so if you were traveling north, you would know what to follow