Which of the following is NOT a type of repeating layout?

In the context of Pega's user interface design, repeating layouts are used to display multiple instances of data in a structured format. Each of the other options mentioned—Row Repeat, Grid, and Tree Grid—indeed represent types of repeating layouts.

A Row Repeat provides a way to display a list of items in a horizontal format where each row represents a single item. This layout is particularly useful for showing items sequentially with specific fields aligned in a row.

A Grid layout enables a two-dimensional arrangement of data, making it ideal for scenarios where you need to present data in rows and columns, allowing for an organized display of information.

A Tree Grid allows for hierarchical data representation, enabling the display of parent-child relationships in a structured way. It helps in visualizing and navigating through complex datasets.

In contrast, a Single Column layout is not considered a repeating layout. It is typically used to display a single element or multiple elements in a straightforward vertical list without the repeating structure inherent to the other layouts mentioned. This distinction is what makes Single Column the correct choice for an option that is not a type of repeating layout.