1. A method, comprising: receiving a montage to present on a presentation surface on a display, the montage comprising multiple presentation tiles and a reference layout, and the presentation surface comprising a grid and having a panning direction; determining when a fixed grid dimension perpendicular to the panning direction is smaller on the display than a corresponding grid dimension in the reference layout; modifying positions of the multiple presentation tiles on the grid in response to the smaller fixed grid dimension, while preserving at least one of an offset or a direction between at least two presentation tiles of the multiple presentation tiles; presenting a user interface view of the presentation surface with the multiple presentation tiles in the modified positions, each presentation tile being associated with a content file and configured to display a portion of content retrieved from the content file; and modifying the positions of the multiple presentation tiles on the grid when a blank space is created by the addition or deletion of a presentation tile in the montage to fill the blank space by identifying a contiguous group of presentation tiles in the panning direction and centering the contiguous group of presentation tiles in the fixed grid dimension.