Intertitle
An intertitle was a word, name, or description indicating the passage of time or establishing the location of a place that appears on screen in a film or on television. 

Beckett Mariner's 2380 holo-novel Crisis Point: The Rise of Vindicta used intertitles to establish the locations of Kabba Lake, Douglas Station, and Idlocana VI. ()

Appendices

Background information 
In the truest sense, intertitles were only sporadically throughout the first seven . They were not otherwise used in any of the first five series, save a few sparse exceptions, the most notable of which were those used for establishing the passage of time during the Year of Hell in the  episodes  and . 

Outside of this, intertitles were frequently used to issue the caveat "To Be Continued...", so as  to establish the episode had reached a cliffhanger. These cliffhangers were often concluded with an introduction by a narrator, a medium that became the modern variation of the intertitle.

Establishing time

Establishing locations

Establishing time and location

Opening crawl 
The opening crawl was a form of intertitle used to establish context for the opening scene of a film or episode. They figured prominently in both the  premiere , where it was introduced in the script simply as 

On Stardate 43997, Captain
Jean Luc Picard of the
Federation starship Enterprise
was kidnapped for six days
by an invading force known
as the Borg. Surgically altered,
he was forced to lead an
assault on Starfleet at Wolf 359.

...and the  premiere , where it was introduced in the script as 

Unhappy with a new treaty,
Federation Colonists along
the Cardassian border have
banded together.
Calling themselves "The Maquis"
they continue to fight the
Cardassians.
Some consider them heroes
but to the governments of
the Federation and Cardassia,
they are outlaws.

End title

External links 
 
 
 Opening crawl at Wookieepedia, the Star Wars wiki

Literary devices