You have two ways to insert images to the messages when sending images to another person. You can send the images as attachments, or send images within the message. Please see below for details:
Step 1: To first compose an email by clicking the "Compose" button on the top left corner;
Step 2: Finish the "To" box and the "Subject" box, then finish the email;
Step 3: Click the "Insert photo" icon at the bottom;
Step 4: In the new window, select the picture and click the "Insert" button;
Alternatively, you can insert the images as attachments.
Step 5: Click the "Attach files" icon at the bottom;
Step 6: Browse to the attachment file folder, select the file and click the "Open" button;
Step 7: You will see the attachments are now at the bottom of the message.