...
By default, all graphs display in linear scale, but IGB allows you the option to transform a graph into other scales. Select the graph(s) and open the Graph Adjuster tab. Select the type of transformation you would like to perform from the pull-down menu labeled Transform, then click GO. The picture below includes all of the options available in IGB. However, many new Plug-ins add more transformation options which then populate this drop down list (see Plug-ins).
IGB duplicates your graph in a new track and applies the selected scale to the new graph; your original graph is not deleted.
...