Here are a few ways to open the Chrome management page on a Chromebook:
In the Chrome browser, type chrome://management in the address bar and press enter. This will directly open the management page.
Open the Chrome browser and in the address bar, type chrome://policy and press enter. On the policy page, click on "User and Device Management" in the left menu.
Click on the time icon in the bottom right corner of the screen, click the gear icon to open Settings, go to Advanced, then click "User and Device Management".
Use the keyboard shortcut Ctrl + Shift + M. This will launch the management page.
If your Chromebook is managed, you can click on the "Managed by" text under your profile icon in the shelf at the bottom to open the management page.
If you have the Chrome Enterprise policy engine installed, go to chrome://policy and click "Device Management".
Open the Chrome menu > Help > Device Management.