But no matter that I have used it for years, occasionally I will find something it does that I simply didn;t know. And a few minutes ago I found one trick.
I like to have the icons ZOOM larger as I move the mouse over them. The normal way to change the zoom amount is to go into Docky Settings and select a dock, then adjust the zoom amount for that dock. You can zoom up to 400% above the base icon size you have chosen.
Today I discovered quite accidentally that scrolling the mouse wheel over an icon on Docky while holding down the CTRL key will also allow you to change the zoom size.
No only that, but I can zoom far further than 400% as you can see in the screen shot! Obviously this is a ridiculous amount of zoom, but there are times when I do adjust the zoom amount and this is a nice easy way to do it without going into settings.
|Elementary across two monitors - Docky zoomed on primary screen with CTRL and mouse wheel|
Wallpaper - One of the wallpapers that comes with Elementary OS