Numerical Fill-In Generator
AutoFill Instructions
How do I use the AutoFill feature?
The AutoFill feature is a simpler way to enter the numbers into the puzzle grid by
simply clicking with the mouse. Once a number has been entered into the program's
AutoFill buffer, only two mouse-clicks are required to fill the number in.
- Step 1: Select a number from the list to fill the AutoFill buffer
Simply click on one of the puzzle's checkboxes to place that number into the
AutoFill buffer. Clicking on the checkbox will toggle its checked status, but will
fill the AutoFill buffer when it becomes checked or unchecked. It is to your
advantage to have those numbers checked off when you place them in the puzzle.
- Step 2: Select the square where the number begins
This is critical. Select the square where the first digit of the
number in the AutoFill buffer will be entered into the User Grid. If you select the
wrong square, simply click on the square again to deselect it. The square is
selected when its background color changes to blue.
- Step 3: Select the direction the number is to be placed
Select a square in the direction that you want to fill the number. The
square must be one of the squares that the number will occupy when filled in.
The AutoFill feature will be aborted IF:
- There are not enough squares to fill the AutoFill number in the grid in the direction
selected.
- There are any black squares that lie in the area where the number would be filled in.
- The second square selected lies to the left or above the starting square.
- Any squares that would be affected by the AutoFill process have a digit in them and the
user chooses not to overwrite the existing numbers.

Example of the Overwrite Confirmation message given if there is a conflict with the
AutoFill process
- The direction selected is contrary to the direction that the number in the AutoFill
buffer is meant to be placed (Large Puzzles only).

Example of AutoFill failure due to filling a Large Puzzle number in the wrong direction
Although the AutoFill feature is a standard feature and is designed to be the primary
way to enter numbers into the User Grid, it is possible and sometimes efficient to enter
numbers one digit at a time using the number keys and the arrow keys. When this is
done, make sure that no square has been selected with the AutoFill (i.e. no square has a
blue background.)