Suunto Spartan Trainer Wrist HR comes with several watch faces to choose from, both digital and analog styles.
To change the watch face:
Go to the Watch face setting from the launcher or keep the middle button pressed to open the in-context menu. Press the middle button to select Watch face
Use the upper right or lower right buttons to scroll through the watch face previews and select the one you want to use by pressing the middle button.
Use the upper right or lower right buttons to scroll through the color options and select the one you want to use.
Each watch face has additional information, such as date or dual time. Press the middle button to switch between views.