Inplace replacement
Problem
Users need to see a bit more details on an item in a large list
Solution
When selecting an item, create more space for the item and display additional details

From
www.tmf.nl
Use when
Variation in using popups or
Overview by Detail. Only use when the amount of additional details that need to be shown is limited, typically 3-5 lines of text.
How
Basically, other items are moved down and the created space is used to give a bit more detail about the selected item. By clicking on the item 'header' again, or by clicking on a different item, the space is reduced to normal again. It is important that the display of the additional information is 'instantly' so that it feels like a mouse-over. So don't use a page refresh to create this effect.
Why
When users just need a bit more information on the item, this type of interaction feels much better than opening a new screen with the details and then having to navigate back to the overview. An
Overview by Detail requires a separate fixed space for the details which may not always be possible in the page design. This method hardly consumes extra space while it still greatly improves the experience.
More Examples