Select “View people” from the left-side panel. Click on the name of the user, you wish to see the skill history. Underneath the skill summary, click on the chevron to see the details of each skill set. Select the skill you wish to learn more about. Hover over the desired skill, until three icons appear on the right, then click on the first graph icon.
A pop-up screen will appear, showing the user’s skill history, with their development over time. The recommended skill level will also be displayed on the graph with a dashed line. Hover over any of the columns on the graph for more information about the skill. Use the visual representation of a timeline below the main graph, to select the time frame of interest.