Can Samsung's SMS contact mode be changed?

If you want to switch the chat mode, please click Info-Menu button in the lower left corner-Chat View under the standby page.

if it cannot be changed after operation, it is recommended to restore the factory settings of the mobile phone (settings-reset-restore the factory settings). Before restoring the factory settings, please back up important data stored on the mobile phone in advance, such as phone book, SMS, photos, video files, etc., because all the contents stored on the mobile phone will be lost after restoring the factory settings.