We can currently use the left mouse button to click on the start, end, or middle of a time block to adjust the start and end times, or to move the entire time range.
I would like to suggest adding a way to cancel these adjustments during the interaction — for example, by pressing the Esc key to cancel the action while dragging or modifying the time block.
Hey @Jacky
Thanks for the post - just to clarify - are you referring to the calendar view when requesting the Esc key be used to cancel a time block you’ve just created by dragging? I’ve just tested this out and the Esc key works like this already, so if I’ve misunderstood please feel free to clarify 
Sorry, I didn’t explain it clearly. This issue occurs when I try to modify a working time by dragging, not when I create a new one.
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Thanks for the clarification @Jacky 
Just to confirm, you are using the desktop app for Win or macOS?