Custom trends and graphs do not need to be created and configured in the Setup menu section. Their main purpose is to quickly analyze the processes, changing the set of parameters, shifting and scaling them for easy viewing.
They are accessed in Setup / Analyitcs menu.
This sub-menu will only be available if there is at least one register in the project with 'save data for graph' option set.
Then you can select any register from the project which have been enabled for logging, and set shift, multiplier and the vertical axis for the register's value.
Tip: The vertical scaling by default is set to 0..maximal value on the selected time interval. If the value becomes negative in some point the curve will be shrinked to 0 in this point. Don't forget to appropriately set min. marging for the vertical axis.
The navigation in the viewing area is the same as for graphs.
The custom trends entry is the next to custom graphs in the Analytics menu and it is always available becuase any register can be immediately viewed on the trend in real-time mode. The custom trend setup is the same as for graphs with the only difference they have extra setting for the time interval viewport will be scaled to.