The first time you log in to the appliance Web UI, the default background display theme is dark. The dark theme makes it easier to read in low light.
To set the light background only for the session, use the Web UI:
Click the Web UI theme toggle button:
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If you want to return to the dark theme, click the toggle button again:
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To set the light background theme until you change it back to dark, use the CLI:
Go to CLI configuration mode.
hostname > enable hostname # configure terminal
Configure the Web UI background theme.
hostname (config) # web preferences global theme light
Save your changes.
hostname (config) # write memory