SMART CASTS
Smart cast automatically casts the selected ability at (or towards) the current mouse cursor position as if you had first pressed the ability button and then left-clicked at the target position. Smart cast works for self-buff abilities, targeted abilities, ground-targeted abilities and skillshots. Smart casting a support buff ability (an ability that can be cast on self e.g. a shield or a heal) when the cursor is on an invalid target will self-cast the ability instead. Note that you can use self-casting to self-cast support buff abilities regardless of cursor location. Using smart cast can be invaluable because it reduces the time delay between activating and casting by cutting the user input in half; activate vs activate and click.
Remember that smart casting means you don't get the targeting graphic, which can make it harder to accurately aim skillshots. They will fire instantly, instead of showing the skillshot for fine tuning the shot. However, there is an option to turn range indicators on, which will show the targeting graphic while the ability key is pressed. This can also be helpful because the ability can then be canceled by right-clicking.
THE COMMAND FOR SMART CAST ARE ON THE LIST IN HOT KEY
Remember that smart casting means you don't get the targeting graphic, which can make it harder to accurately aim skillshots. They will fire instantly, instead of showing the skillshot for fine tuning the shot. However, there is an option to turn range indicators on, which will show the targeting graphic while the ability key is pressed. This can also be helpful because the ability can then be canceled by right-clicking.
THE COMMAND FOR SMART CAST ARE ON THE LIST IN HOT KEY