Facebook's messaging tool does not limit you to mere text communication, but includes an attachment option to send photos. The application allows you to send multiple photos in a private message format, rather than posting the pictures to your profile page. The messaging option is a method to consider when you need to send multiple photos to Facebook friends discreetly.
Log into your Facebook account.
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Click the "Messages" icon located on the left side of the screen.
Click the "New Messages" button.
Enter the message recipient's name in the "To" field.
Type a message in the "Message" field, if desired.
Double-click the paperclip icon located below the "Message" field. The "Choose File to Upload" window will appear.
Select the picture file you wish to attach from your computer. Click "Open." The picture will attach to your message.
Double-click the paperclip icon for subsequent photo attachments. Repeat the file attachment procedures in the previous step.
Click "Send" to send your message with the photos attached.