Select from Menu Mosaic - Manual Mosaic Library.

Manual Mosaic Library Screen.

When you click on a cell in the main window, you'll see this cell enlarged on the top row of the Manual tiles window.

To preview a changed tile, click on the row with candidate thumbnail you like.

To replace the tile please press the Replace Tile button or double click on the candidate thumbnail row.

Show Best Images - Set a count of a candidate thumbnail to show in the grid.

Replace Tile - Press this button to replace a cell in the mosaic.

Close - Press this button to close the Manual tiles screen.