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6. Subject Tools
7. Help
3.5.2 How to write on the board?
Directly select the pen with setting line color and width in the main tool bar.
Or on the left side bar, select the icon
for more setting.
3.5.3 How to erase on the board?
Object eraser: Click the eraser icon in the toolbar and select the object eraser function, then select the object,
the object will be erased.
Point eraser: This function is the same as that in the traditional blackboard. You can select the point eraser
icon to erase the content point by point.
