Did exist a way to modificate the cooldown in older versions?

[HerlySQR]

I know in newer versions there is an option to do that, but what happened in older versions?

 

[IcemanBo]

This is a very interesting thread to read about cooldown from older patches. Custom cooldown interface

 

[Tal'Rarity]

I think one can also use spellshield with engineering upgrade though won't display numbers on the ability's icons like the one iceman linked however won't clutter your object editor with 300+ dummy abilities.

 

[noob]

Or you can do a two part cooldown thing where you create a dummy sellable object per skill and make its available object count lower each second and once it reach 0 you give back the ability(and make the object stop being sold)
That works for skills with a cooldown up to 100 seconds and if you are not happy with it then you can mess up with engineering update and skills with charges but then it is at your own risks and perils.