The Civilization Pen was a technological tool used for writing and painting. It could be used for various creative activities. If the Civilization Pen couldn't click on the upper left corner of the tablet, it might be because of one of the following reasons: 1 Pen not connected correctly: Make sure the pen and tablet are connected correctly, insert the pen into the pen holder and press the button. If there is a problem with the connection, the pen may not be able to move or connect to the tablet correctly. 2. Tablet damage: If there is a problem with the tablet, such as damage to the surface, damage or missing parts, the pen may not work properly. In this case, he needed to change the writing board or find other solutions. [3. Function settings of the pen: The Civilization pen might have been set to prohibit clicking on the upper left corner of the tablet.] If you want to restore this function, you need to find and cancel the settings. If the above methods cannot solve the problem, it is recommended to contact the manufacturer or technical support personnel for more specific help and suggestions.