Sometimes WaterGEMS seems to have the most peculiar default intervals on graphs on the y-axis. I regularly see intervals of 0.63, 1.25,12.5, and 62.50. All of these tend to obscure the values I actually care about. I would much rather see intervals of 0.5, 1, 10, and 50, respectively. I would suggest removing these 1/8 and 5/8 fractional values from the default interval set. I'm not sure if 7/8 values like 0.83 are ever used, but I'd recommend removing them as well if they are. Intervals of 1/4 values like 0.25 makes much more sense to me.

For example, hydrant flow curves often present pressure in increments of 13 psi, 25 psi, 38 psi, etc. In the history of OpenFlows products, I don't think anyone has cared more about fire flow at 13 or 25 psi than they cared about fire flow at 20 psi. The default intervals obscure this information.