How to make throwing and testing smoke grenades more efficient? sv_infinite_ammo 1 makes you have many... I'd prefer to throw/place them and shortly see the smoke. Maybe smoke can be made last shorter or be deleted with some command after being set off?
Use decoy's instead of smokes (they have the exact same fuse/throw arc) and the command "sv_grenade_trajectory 1" to see where they travel. Then once you have the throw down use smokes to see the cover you get and fine tune the throw.
I know its not exactly what you were wanting but its the best way of doing it, that I know at least.
There are no settings in the base release of Counter Strike Global Offensive that provide the functionality that you're after. I'm not even sure off the top of my head of any mods that would provide you with this functionality.
As pointed out you can use
Your only option would likely be using a sourcemod.