This refers to the Thumbtack icon, the first command in the Charts main menu, that selects a specific object (window) and displays it to the front, forward position, or on top of other windows.
There are two positions:
The Thumbtack that displays the point out to the left represents stay on top position and displays the chart to the front of other windows. Refer to the Figure below.
The Thumbtack that displays the point in and downward places the Chart behind other windows. Refer to the Figure below.