Digits (Numbers) To enter numbers, there are two methods:
Quick Entry This method consists of selecting with the pointer the virtual location of the candidate within the cell. Indeed the candidates are always arranged following this order :
Once you get familiarized with this method, you don't even need to actually see the candidates. You know that by selecting the middle of the cell, you will get a five (5), by clicking on the bottom right corner a nine (9), etc...
Note that if the "Show Candidates" mode is enabled, you can enter the real candidates only.
Contextual Menu This method implies two actions:
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First, you make appear the contextual menu. On Pocket PC, use the Tap & hold gesture. On Windows, right-click on the target cell.
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Then you select the desired digit from the menu.
Entry Color Sudoktor allows you to set the color of the new numbers to be inserted. The default color is blue.
Pencil marks To enter pencil marks for the possible candidates, first select the "Pencil marks mode.
Then use one of the two methods described above. To set an new pencil mark select it, it will be toggled on. To remove an existing pencil mark simply select it, it will be toggled off. Sudoktor does not allow you to enter an illegal pencil mark.
Instead of entering the pencil marks tediously, you can store them from the candidates that Sudoktor has computed with {Marks -> Store Candidates}. The command {Marks -> Clear All} removes all of the pencil marks. {Marks -> Undo Last Mark} removes the last entered pencil mark.