When I try to use Onion Skin the handles on the timeline that you can adjust to include more or fewer frames, is not visible in my timeline. I have selected an object like an arm in the scene I animated and activated the onion skin but there are no handles. In fact, now I don’t even see the drawing positions of the other frames in the window. I have tried both the Advance Onion skin and the regular from the drop-down menu and I have adjusted the sliders in the Onion Skin View. I have Harmony 17.2. It has never worked for me since I started using it. I have read the material in the Online Help.
I do have the cursor for the scrubbing slider in the Timeline View but there are no Handles for Onion Skin.