In order to affect a specific item in a repeater, it is recommended to use hierarchical transformations. Hierarchical transformations are basically nested transformation which allow you to target a specific item using a sub-transformation. These are the available options:
•Item transformation - applied to all displayed items that are not covered by a specialized transformation type (e.g. alternating items, first items etc.).
•Alternating item transformation - applied to items that have an even position in the listing order. Every level in the hierarchy has its own separate alternation pattern.
•First item transformation - applied to the first item on every level in the hierarchy. Only works for levels that contain more than one item.
•Last item transformation - applied to the last item on every level. Only works for levels that contain more than one item.
•Header transformation - rendered at the beginning of every level (before the first item on the level). These transformations provide a convenient way to visually separate or style individual levels.
•Footer transformation - rendered at the end of every level (after the last item on the level). Can be used to close encapsulating elements from the Header.
•Single item transformation - applied in cases where there is only one item on a level in the hierarchy.
•Separator transformation - rendered between items on the same level. It is not placed between items on different hierarchy levels (i.e. between a parent item and its child).
•Current item transformation - applied to the currently selected item (i.e. the document that is being viewed). Please note that it is always necessary to specify a Document type (or types) for this kind of transformation.
If there are multiple sub-transformations being applied to one item, only the highest priority transformation type will be used:
1.Current item (top priority)
The following link is to an article in the developer's guide that explains how to configure and use hierarchical transformations: Hierarchical transformations
Please let me know if you need any additional clarification on this. Thank you!