https://www.facebook.com。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/fc\/Read-Old-Messages-on-Facebook-Step-7.jpg\/v4-460px-Read-Old-Messages-on-Facebook-Step-7.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/fc\/Read-Old-Messages-on-Facebook-Step-7.jpg\/v4-760px-Read-Old-Messages-on-Facebook-Step-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}2单击Messenger图标。因此对话时间越早,位置就越靠下。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/5\/58\/Read-Old-Messages-on-Facebook-Step-12.jpg\/v4-460px-Read-Old-Messages-on-Facebook-Step-12.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/5\/58\/Read-Old-Messages-on-Facebook-Step-12.jpg\/v4-760px-Read-Old-Messages-on-Facebook-Step-12.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}7单击“设置”{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/d\/d0\/Windowssettings.png","bigUrl":"https:\/\/www.wikihow.com\/images_en\/d\/d0\/Windowssettings.png","smallWidth":460,"smallHeight":445,"bigWidth":760,"bigHeight":735.483870967742}。