After logging in to 163 mailbox, click "Settings"-"General Settings" above.
Click "Signature/Electronic Business Card" on the left after entering.
Click "New Business Card Signature" on the right.
Click on each content to start editing input.
Move the mouse over the picture, and "Modify" and "Delete" will appear. Click Modify to open the picture. Click the mouse on the picture to move the display area, and move it below to zoom in and out.
After modification, enter Name in Business Card Settings, click Save, and select Use in Optional Signature.