打开Twitter。 点击信封图标。 点击新私信图标。 输入用户名字。 点击对方用户名。 点击“下一步”。 在文本框内输入信息。 点击“发送”。

Given the above summary, write a detailed text in English for it.
If you haven't already, login when prompted, or you can  learn how to make a Twitter account here. It's located in the top-right corner of your screen. It's the chat bubble with a plus sign in the bottom right corner of your screen.  Their name will appear in the text box. " You can also add pictures, GIFs, or emojis to your message by tapping on the appropriate icon. " The send button is located to the right of the text box and will not appear until text or a picture, emoji, or GIF has been entered into the text box. Depending on the user's notification settings, the user may or may not receive a notification that they have a new message.