Yealink SIP-T4X Administration Manual page 55

Administrator's Guide for SIP-T4X IP Phones
2. In the Upload Wallpaper (480*272) field, click Browse to locate the wallpaper
image from your local system.
3. Click Upload to upload the file.
4. Click Confirm to accept the change.
The custom wallpaper appears in the pull-down list of Wallpaper.
To change the wallpaper via web user interface:
1. Click on Settings->Preference.
2. Select the desired wallpaper from the pull-down list of Wallpaper.
3. Click Confirm to accept the change.
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