Seems so simple, and would be nice if it was a one line setting or solution, but after searching forums, I found a pretty easy fix.
Add this code to your settings file:
And you will get a cursor like this:
Adjust the width to your comfort level. I like 4.
credit Zoran Simic here
Here’s how to change the speed of a video clip in Screenflow, either speeding it up or slowing it down. If you hover the mouse over the end of the clip, and press the Option button (Mac), then you will see a clock icon. Holding Option, drag the end of the clip right or left, making it slower or faster. You will see a popup with the time and speed hover over the end of the clip. Pretty easy right!