Ability to adjust task box length from top left

Allow shortening and lengthening events from the top left corner, in addition to the bottom right. Right now you can only shorten the end time of an event by simply holding the bottom right corner and then moving to the new end time. In Apple calendar, and others, you can tap and hold the top of an event and change the start time from that way too. I may want the end time to stay the same, but change the start time. As it is, I would have to click on the event, change the start time, then also drag to change the end time (or change the duration) rather than just tap and hold, and then drag the start time.