返回“相机”页面。 拍一张快照。 点击“发送”图标。 选择好友。 点击“发送”图标。 向好友发送更多的照片或视频。 对方也要向你发送快照。

Given the above summary, write a detailed text in English for it.
If you haven't already done so, tap the "Back" button in the top-left corner of the screen to go back to your profile page, then tap X to close your profile page. Point the camera at something that you want to send, then tap the circular "Capture" button. If you want to take a video snap, tap and hold the "Capture" button until you're done recording, then release the button. It's a blue-and-white arrow in the bottom-right corner of the screen. Doing so takes you to the friends list. You can add effects to your snap before sending it if you like. Tap your friend's name to select them as the recipient of your snap. Avoid sending snaps to other people for now, since your primary goal is to get your friend onto your Best Friends list. It's the blue-and-white arrow in the bottom-right corner of the screen. This will send your snap to your friend. In order for the snap to be counted toward the Best Friends list score, your friend must open your snap. Sending photo and video snaps to a friend more frequently than to any of your other friends will quickly put the friend on your Best Friends list. The more snaps you send that friend, the sooner the person will end up on your Best Friends list. While they may end up on your Best Friends list because of all the snaps that you send to them, they must also snap you more than anyone else in their friends list for it to be mutual.