Final answer:
In the context of narrative transitions, while set and costume changes are necessary for theatre productions, they are not used to mark transitions within the text or story itself. Instead, elements like transitional words, tone, and point of view are used for this purpose, particularly in written texts or films.
Step-by-step explanation:
Techniques and devices used to mark transitions from one section or episode to another can involve various elements like transitional words and phrases, tone, voice, point of view, setting, and even time-stamps or symbolic images in the case of a nonlinear narrative. However, technical adjustments to the set and costume changes in a theatre production, while they are transitions, do not serve to mark the transition in the narrative or text itself, but are practical necessities to support the visual and logistical aspects of a live performance. The director's job is to manage these transitions to maintain the illusion of the story without disruption. These stage transitions are important in theatre but do not apply to the narrative transitions found in written texts or the flow of a documentary film, for example. In the context of writing, transitioning a scene could involve explicit methods like foreshadowing or more subtle ones like shifts in tone, but it does not involve changes to physical stage settings.