Tweak the range of all electric poles and substations by a global decimal multiplier. Both supply area and wire reach is affected.

For example, a value of 2.0 will double the supply area and wire reach of all poles, including poles added by mods.

The maximum supply area is capped at 128x128, and wire reach is capped at 64. These are hardcoded engine limits.

It defaults to 1.0 (no change). Tweak the value in the Startup tab in Settings > Mod Settings from the main menu.