There are technically no limits to the length of textual anchors. You could have several lines of text highlighted, all of which connect to a single document. It is generally better, though, to keep textual anchors reasonably short. Anchors which are too long can confuse users and obscure other important textual information. Icons Icons are in-line images used for either identification or navigation.
Navigational icons are anchors which are always highlighted on the user's screen.
Identification icons are not anchors, and are therefore not highlighted. Identification icons are in-line images, such as letterheads, logos, or running heads, which are used for identity on hypertext landing pages. It can be particularly helpful to create identification icons for all landing pages and then to use the same icon as an anchor from other pages to that landing page. In some instances it will be appropriate to shrink or crop an identification icon to make it a useful navigational icon. Navigational icons are in-line images used as anchors to landing pages.