Using this window you can set low level options for detected chips.
Please note that setting these options might cause your system to become unstable. You should know what you are doing.
First you have to select a CHIP, then select any of the available PROPERTIES and, finally, use the SET TO field to change its value to a different one. The newly selected value is immediately applied as soon as it's chosen from the list. You can use this feature to check the results in real time. For example: you might change the FAN DIVISOR to a higher value (say, for example, from 2 to 8) to be able to read the RPMs for a slow fan and see the reported RPM value (if any :-)) on the main window.
By setting the REMEMBER IT checkbox, you will force SpeedFan to restore that setting upon next restarting. Please note that this option works on a per property basis. You can force SpeedFan to set, say, FAN2 Divisor for your Winbond W83782D at $2D on SMBus to 8 and leave unchanged every other FAN Divisor.