Sorry for delays between posts...dsl probs.
After you click on a blue cell and you move your cursor off of it and it becomes a +, you shouild be able to fill in the cell from your keyboard, then go to the next cell, click on it and repeat.
After you click on a blue cell and you move your cursor off of it and it becomes a +, you shouild be able to fill in the cell from your keyboard, then go to the next cell, click on it and repeat.