Editing : Edit Modes and Tools : Using the Smart Tool : The Smart Tool in Automation and Controller Views

The Smart Tool in Automation and Controller Views
The following capabilities are available with the Smart Tool when working in both automation and controller views:
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For the Selector tool, position the cursor anywhere in the bottom 75% of the playlist for the Selector tool. Drag with the Selector tool to select breakpoints.
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For Trim tools, position the cursor in the top 25% of the playlist for the Trim tool. Drag with the Trim tool to trim breakpoints. Press Control (Windows) or Command (Mac) while trimming for fine control.
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For Grabber tools, Control (Windows) or Command (Mac) for the Grabber tool, then click in on the automation line to create breakpoints.
To edit existing breakpoints, move the cursor near a breakpoint for the Grabber tool.
For fine control with the Grabber tool, press Control (Windows) or Command (Mac)—or continue to hold the key if you are creating a new breakpoint.
To vertically constrain Grabber tool movement, press Shift.
To vertically constrain Grabber tool movement with fine control, press Control+Shift (Windows) or Command+Shift (Mac).