The order of the multi-track graph operations does not follow the testing instructions. In both 9.1.4 and 9.1.6 the first operation for the multi-graph track operation will produce a new graph of the same color as the first of the two graphs selected (if I select the green graph first then shift click to select the blue graph, create a new graph, the color of the new graph will be green). If the user then immediately clicks Go under multi-graph it will produce a new graph that is the color of whichever of the two selected graphs is on top. So the order of the selected graph only matters for the initial multi-graph operation in regards to color. Subsequent multi-graph operations graph colors are determined by which graph is on top.

The Single Track Operations - part 4 - inverse logs section of the testing does not appear to be correct. Where it says that "Diff Inverse Inverse case above, these blue tracks should be all 0-values." - these numbers should not equate to zero. The inverse log operator appears to be antilog. So the inverse log2 of 4 should be 16 (which is what is shown in IGB). The log2 of 4 is 2. The inverse of 2 (1/2) is 0.5 (which is what is shown in IGB). The diff of 16 and 0.5 is not 0.

It is unclear to me what this section is trying to test, but I think it needs to be rewritten.

Tested on Linux Fedora 27 GNOME Version 3.26.2

Created new issue to update testing instructions - see link. Moving to closed.