Coriolis has a brilliant feature where you can click the titlebar above a category and choose a module. It then fills all empty slots with that module. If you alt-click, it also overwrites all non-empty slots.
This makes it extremely quick and easy to fill a ship with the best cargo racks for every slot, or best lasers, or shield booster utilities, etc.
EDSY can of course already ctrl-drag modules to copy them one by one, but it can't copy larger modules to smaller slots, and even if it could do that it's still nowhere near as convenient as the Coriolis method, seen below:

This could be implemented as a triple-state icon-based button in the EDSY module selector, with these states:
- Normal: Only modify the selected slot.
- Fill Empty: Fill empty slots with the selected module.
- Fill All: Replace all slot contents in that category with the selected module type.
Placed here:

Coriolis has a brilliant feature where you can click the titlebar above a category and choose a module. It then fills all empty slots with that module. If you alt-click, it also overwrites all non-empty slots.
This makes it extremely quick and easy to fill a ship with the best cargo racks for every slot, or best lasers, or shield booster utilities, etc.
EDSY can of course already ctrl-drag modules to copy them one by one, but it can't copy larger modules to smaller slots, and even if it could do that it's still nowhere near as convenient as the Coriolis method, seen below:
This could be implemented as a triple-state icon-based button in the EDSY module selector, with these states:
Placed here: