To take a screenshot on your Samsung J3, you can use the following methods:

1. Using hardware keys:
- Open the screen that you want to capture.
- Press and hold the power button on the right side and the home button at the same time.
- Wait for the border around the screen to flash white.
- Done!

2. Using palm swipe:
- Go to Settings > Advanced features > Motions and gestures > Palm swipe to capture.
- Turn on Palm swipe to capture.
- Swipe your hand across the screen from right to left or from left to right.

3. Using scroll capture:
- Open the screen that you want to capture.
- Take a screenshot using either of the above methods.
- Tap Scroll capture from the options that appear at the bottom of the screen.
- Keep tapping Scroll capture until you have captured all of the content you want.

4. Using your voice:
- Open Bixby Voice or Google Assistant.
- Say "Take a screenshot."

You can view your screenshots by going to Gallery > Screenshots.

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