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
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0
Finished!
5
16
11
3
13
24
12
6
9
8
11
8
20
16
12
3
9
8
16
18
7
5
12
14
12
17
7
15
8
19
17
12
5
11
9
7
123
456
789
×
456
789
×
Starting in 5