From the article editor, hover over the screenshot you want to convert and
click on the GIF button. 

The GIF editor will open with a preview of your GIF. You can adjust the
timing to select the perfect sub-clip from your video. By default, the
timings are set to 2 seconds before and after the instant of the screenshot.

From the top menu, you can adjust the zoom level and playback rate of the
zoom. At any point, click on the Preview button to see what your GIF
will look like. 

