Similar windows are available for showing both current CPU usage ( Command-2) and CPU usage history ( Command-3). The GPU History window isn’t the only handy display available via Activity Monitor. The GPU usage window will remain always on top by default, but you can toggle that behavior by selecting Window > Keep CPU Windows on Top from the menu bar.You can click and drag on the small dot between each graph to change its size. This opens a new window called GPU History, which displays a utilization history for each GPU currently available to your Mac.
You can find it in its default location (Applications > Utilities) or by searching for it with Spotlight. 2018 Host : MacBook Pro Retina (13 inches), early 2015 OS : High Sierra Virtual.
