HP Color LaserJet Enterprise CM4540 MFP series - Manual (Page 31)

Control-panel help
The product has a built-in Help system that explains how to use each screen. To open the Help system,
touch the Help button in the upper-right corner of the screen.
For some screens, the Help opens to a global menu where you can search for specific topics. You can
browse through the menu structure by touching the buttons in the menu.
For screens that contain settings for individual jobs, the Help opens to a topic that explains the options
for that screen.
If the product alerts you of an error or warning, touch the error or warning button to open a
message that describes the problem. The message also contains instructions to help solve the problem.
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