Fill in the grid with numbers from 1 to the grid size, so that every number appears exactly once in each row and column (like in Sudoku), and so that all the > signs represent true inequalities (i.e. the number at the pointed end is smaller than the number at the open end).
To place a number, click in a square to select it, then type the number on the keyboard. To erase a number, click to select a square and then press Backspace.
Right-click in a square and then type a number to add or remove the number as a pencil mark, indicating numbers that you think might go in that square. Press the M key to fill every square with an full set of pencil marks.
In ‘Adjacent’ mode (selectable from the Type menu), bars appear instead of > signs. Cells with bars between them must have adjacent numbers (i.e. one higher or lower), and cells without bars between them must not have adjacent numbers.