Google has adopted a new style editor interface for all Gmail users. New interface with compact design and many hidden tools makes many people feel confused and strange.
Currently, Gmail users can temporarily switch back to the old style editor interface.
Click the ' Compose' button to open a new email editor window. At the bottom right of that window, click the arrow to bring up a menu (menu). Among the options that appear, click 'Temporarily switch back to old compose'.
This approach will only allow users to temporarily switch back to the old style editor interface, it is not clear when Gmail will provide this option until before forcing all users to switch to the new interface.