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, while preserving a spatial characterization of the presentation tiles to each other; and presenting a user interface view of the presentation surface with the multiple presentation tiles in the modified positions.