A sequence is a container that allows you to display inserted elements in chronological order. With a sequence you can, for example, present images similar to a slideshow or play videos one after the other like in a playlist. Any standard element can be inserted into a sequence. The display duration can be set individually for each inserted element, except for video elements, where the duration always corresponds to that of the video. The display duration is set in the element tree:

In the Presentation section, you can define the default value of the display duration in the Period option, which is used by default when an element is inserted into the sequence. This value is not applied when inserting video elements, because they are always played completely in a sequence before the next element in the sequence is displayed. You can enable a two-second transition from element to element by activating the "Use transitions" setting. 

Type

The layout type controls how elements can be positioned in the container. Changing the layout type can change the positions and possibly the sizes of all elements within the container. A change converts the element into a container, a sequence, a swap container (navigation, condition), a container (vertical), a container (horizontal), a container (wrap), or a presentation container.