The steps to modify the attenuation coefficient of communication history of mac version are as follows:

1. Open the Attenuation Factor Settings window and enter the historical attenuation factor you want to change in the Historical Attenuation Factor column;

2. Click OK to finish the modification.

Historical attenuation coefficient is a method to measure investment risk, which refers to the degree of reduction of investment income in a certain period of time, and is usually used to measure the risk taken by investors in the same investment variety or asset portfolio.