Long-press the home screen
Touch and hold an empty area on your Samsung home screen until the customization options appear.
Samsung guide
How to add widgets on Samsung phones
On many Samsung phones, you can add widgets from the home screen. Use these general steps to place Widget Flashcards as a vocabulary widget.
Choose Widgets
Open Widgets, search for Widget Flashcards, and select the available flashcard widget size.
Place and configure
Move the widget where you want it, then use Widget Flashcards to choose a deck and template.