You can change the Xiaomi Mi Smart Band 4 watch face directly on the band or through the Mi Fit app. A watch face changes the layout of the main screen, including elements such as the time, date, step count, and overall display style.
[reference] Title: Watch Face Text: The main display design used for the clock screen and its visible information. Title: Band Display Text: The menu used to browse and select available display styles on the Mi Smart Band 4. [/reference] [compare] On the Band | Quickly switch between watch faces already stored on the Mi Smart Band 4. Mi Fit App | Browse watch faces on the phone and sync the selected design to the paired band. [/compare]Change the Watch Face on the Band
Use this method when you want to choose from the watch faces already available on the band without opening the mobile app.
Wake the display.
Tap the touch area at the bottom of the screen. Make sure the band has enough battery and the display responds normally before continuing. 
Open More.
Swipe through the band menu until you reach
More
, then tap it to open the additional options.
Open Band display.
Scroll through the More menu, select
Band display
, and open the available watch-face choices.
Choose a watch face.
Browse the stored designs and select the layout you want to use.
Check the main screen.
Return to the main display and confirm that the selected watch face is active.
[tip] The band method only shows watch faces already stored on the device. Use the app method when you want to browse additional available styles. [/tip]Change the Watch Face with the Mi Fit App
The app method lets you browse watch-face options on the phone and send the selected design to the Xiaomi Mi Smart Band 4.
[checklist] * Mi Fit app is installed * Xiaomi Mi Smart Band 4 is already paired with the phone * Bluetooth is enabled * Band and phone are kept close during synchronization [/checklist]Check the band connection.
The Xiaomi Mi Smart Band 4 must already be paired with the phone so the app can communicate with it and transfer the selected watch face.
Open the Mi Fit app.
Launch Mi Fit and make sure Bluetooth remains enabled while you choose and sync the watch face.
Open Profile.
Tap Profile to view connected devices and device-specific settings.
Select Xiaomi Mi Smart Band 4.
Choose the band from the connected-device list to open its settings.
Open Band display settings.
Tap Band display settings to view the available watch-face designs.
Choose a watch face.
Browse the available designs and tap the one you want to use.
Sync the watch face.
Tap Sync now to send the selected design to the band. Keep the phone close to the band and leave Bluetooth enabled until synchronization is complete. The selected watch face should then appear on the band.
Basic Sync Check
[troubleshoot] Problem: The selected watch face does not finish syncing Cause: The band may not have an active connection to the phone, Bluetooth may need to reconnect, or the devices may be too far apart Fix: Keep the phone close to the band, confirm Bluetooth is enabled, turn Bluetooth off and on again if needed, reopen the Mi Fit app, and try the synchronization again [/troubleshoot]What Changes
Changing the watch face changes the visual design of the main display. It does not change your fitness data, pairing status, or other saved settings.
For quick changes, choose a face already stored on the band. For a wider selection and phone-based browsing, use the Mi Fit app and synchronize your chosen design to the Xiaomi Mi Smart Band 4.