Suggestion

On creative, you can fast take a stack of items and place them in your hotbar via pressing 1-9 atop an item. It's very useful due to not having to drag'n'drop said item into the inventory, saving lots of time if you were, say, in a laptop, for example.
My suggestion is adding the same behaviour into JEI's Cheat Mode: Ctrl+(1-9) to put a stack of an item in the pressed space.

Thak you for your time, as always.

I really ought to read the configs better. Thank you very much!

Thanks for the suggestion!
There is a config setting, CheatToHotbarUsingHotkeysEnabled in the JEI client config file.
It is not enabled by default because hitting it accidentally can be confusing unless you know about it.

Would be nice to remove the chat message that is sent when doing this.