You can create a remark for each day where you can specify some more instructions to students and teachers or where you can write down some very complicated swaps.
Go to menu Main/Tools:
You can also input the remark in print preview, right click at the top of the page or directly at the remark if you have already inputted one:
Using this way you can also change the font of the remark.
In versions prior to 2010:
Then you might modify how it is displayed by clicking right mouse button on the remark in the printpreview:
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