To enter a number:
Left-click in the desired square and choose a number from the popup keypad
-or-
Point to the desired square and press a number key on the keyboard
To clear a number:
Left-click in the desired square and choose 'x' from the popup keypad
-or-
Point to the desired square and press the space key on the keyboard
To create a pencil mark:
Right-click in the desired square and choose a number from the popup keypad
(For single-button mice, hold SHIFT or CTRL while clicking)
-or-
Point to the desired square and press a number key while holding SHIFT
Time
0
0
Finished!
7
4
2
8
4
7
7
5
6
8
5
3
4
8
2
1
5
7
8
2
9
5
1
2
6
5
8
2
123
456
789
×
456
789
×
Starting in 5