Moving from one scene to another is a small technical problem that most work solves by habit and a few works solve deliberately. The reader has to understand that time or place has changed, by how much, and where they now are, and all of that should happen without them stopping to work it out.
When a transition fails the reader notices sharply, rereads, and loses the thread. When it succeeds they notice nothing at all, which is why the subject gets so little attention despite occurring dozens of times in any long work.
What a transition has to communicate
Three things: that a change has occurred, roughly how much time passed, and where we are now. The first is usually handled by format, a gutter or a cut. The second and third have to be carried by content, and forgetting the second is the commonest cause of confusion.
Time cues are cheap. A change of light, a meal in progress, wet hair, a different outfit. Any one of these tells a reader that hours passed without a caption, and the environment-as-information argument runs through all of them.
Matching across the cut
The smoothest transitions carry something across: a shape in the same screen position, a similar composition, a repeated colour, a continued sound. The reader's eye lands where it already was and the change registers as continuous rather than abrupt.
This works in comics as well as film. Ending a page with a round shape at the top right and opening the next with a round shape in the same place produces a join a reader glides over. It costs nothing beyond noticing the opportunity.
Hard cuts and when they work
A hard cut, with nothing carried across, works when the new scene locates immediately and unambiguously. That means a wide establishing view or a very recognisable place. Cutting hard into a close-up is where readers get lost, since there is nothing to orient on.
This is the same anchoring requirement described in the piece on close range. If a scene must open close, keep one recognisable landmark in frame so the reader can place themselves in one glance.
Transitions that mean something
Some cuts carry meaning rather than only mechanics. Cutting from one character's face to a place she is thinking about, or from an action to its consequence in a different room, makes a connection the reader assembles. These are worth using and worth using sparingly.
A transition that draws attention should be earning it. Used constantly, clever cuts become a mannerism and the work starts to feel restless, which is the same problem as cutting for variety described in the piece on pacing.
Page turns are transitions too
In comics the page turn is a built-in transition point and the strongest one available, since the reader cannot see across it. Placing scene changes on turns uses that concealment, and placing them mid-spread wastes it, which is the structural point made in the piece on panel rhythm.
In vertical-scroll formats the equivalent is a stretch of empty space, which does the same job by breaking the flow of images. Both are free and both get overlooked in favour of a caption saying later that evening.
Captions as a last resort
A caption naming the time and place always works and always costs something, since it tells rather than shows and it announces that the visual solution was not found. Used occasionally it is unremarkable; used for every transition it flattens the work.
The useful discipline is to try to solve each transition visually first and to allow yourself a caption when the visual answer would take more space than the transition is worth. That keeps captions rare enough to feel deliberate.
Joining scenes so nobody notices
Signal the change, give a cue for elapsed time, locate the new scene immediately, match something across the cut where you can, use page turns, and keep captions for the cases where nothing visual fits. That covers almost every transition a long work contains.
Characters here are fictional and unmistakably adult, as set out in the reader agreement.