To save screen space, close a tool when you are done with it. The Frequency tool can be used to study electrical coupling between any two points in a cell. Suppose an interesting signal is generated at some location in a neuron, e.g. by a synapse or by active conductances. An electrode is attached to the cell, but not necessarily where the signal is produced. Bring up the Frequency tool.
Top panel controls operation of the tool, and tells what is happening.
Zoom in or out as needed to see the whole cell. For most cells, attenuations at DC and 0.1 Hz are nearly identical. The Path tool is useful when the general location of the signal source is known, or when there are several independent signal sources at different locations. It performs the same kind of analyses that the Frequency tool does, but it allows the user to examine signaling between an electrode and a region instead of a specific location. Bring up the Path tool.