How long should a slide stay on screen

The question “how long should a slide last?” sounds as if one number will answer it. It will not. The same message may be too brief in a waiting room, appropriate in a checkout queue and pointlessly long in a corridor where people keep moving. A useful duration comes from three facts: how long the viewer remains nearby, how long the scene takes to understand, and how long somebody must wait before an important message returns.

Measure the contact window first

Observe the location rather than the display. Note when an average viewer enters readable range and when they leave it. That may be only a few seconds in a passage and much longer in a queue or waiting area. Do not copy a value from another installation without testing it. Corridor width, direction of travel, viewing distance and what the person is doing at that moment change the answer more than the industry label does.

For the first estimate, write a range such as “most people have between four and seven seconds” instead of pretending the answer is exactly five. That range is the budget for the whole scene: noticing the headline, reading the message and deciding whether to act.

Then measure the reading time

Read every visible word aloud at a normal pace. Add a short allowance for the eye to find the beginning and understand the photograph or price. The result is the lower limit. If it exceeds the contact window, leaving the slide up longer is not a solution because the viewer will already have gone. Shorten the sentence, remove a secondary detail, or split it into two self-contained scenes that still make sense when seen separately.

Content type changes the calculation

A photograph with one price usually takes less time than a timetable with several rows. Video has its own pace and should still communicate without audio when the screen is muted. An app such as RSS may rotate stories inside its view, while Google Slides has a separate seconds-per-slide setting. Those cases introduce two timers: how long the app remains in the main loop and how long it shows one internal item. Check both, because a well-paced internal rotation is useless if the whole app leaves the stage too soon.

Calculate the complete loop

Add the duration of every active item. That total is the earliest point at which the first message returns. Compare it with the audience dwell time. If a person normally sees only half the loop, essential information cannot appear once at the very end. If they remain long enough to see the loop many times, an excessively short rotation soon feels repetitive or even looks like a fault.

Do not repair a short loop by adding random filler. A few relevant scenes with different jobs are stronger: one answer to a common question, one offer, one practical notice and one calm visual. Their order should make sense regardless of the point at which a viewer arrives.

Set it, preview it, then test it on the wall

In the SignageWall editor, duration belongs to each media or app item, while a playlist plays its active items in order. Preview the complete loop, but make the final decision on the target device. Stand at the start of the viewing zone, enter it at a random moment and note what you understand before leaving. Repeat the test several times because the audience does not always arrive when the loop begins.

A repeatable method for every new scene

1. Record the contact-time range for the location.
2. Measure reading and add an allowance for orientation.
3. Shorten the message if it does not fit the available time.
4. Total the loop and check how much the audience really sees.
5. Publish to one display and observe it in the physical space.

Duration is not a decorative design setting. It is an agreement between a message and a place. When the circumstances change (the display moves, the queue becomes shorter, or an app with its own rotation is added) measure again. The right number is the one a viewer can use, not the one that looks tidy in a settings field.