To edit the grids, select or deselect individual cells using left clicks. Selected cells are drawn in black.
In the pattern grid, columns represent time and rows represent slices, so a diagonal line from top left to bottom right corresponds to the original order of slices. It is possible to insert a pause by not selecting a slice for a given column.
To listen to individual slices, left-click the column label. To select a whole row, left-click the row label. Similarly, right-clicking a row label deselects the corresponding row.
If you select a group of cells, a row of cells will be selected. If the selection is symmetrical, it is filled with a diagonal line from top left to bottom right.
Unlike the pattern grid, the effects grid permits multiple selections per column. Columns once more represent time and each row controls one effect.