Canon i-SENSYS MF729Cx Important Safety Instructions And Installation Manual page 598

3
Hold the green knobs, and push down the part shown in the figure.
4
Gently pull out the paper.
5
Hold the green knobs, return the part shown in the figure back in place, and close the cover.
Return the part shown in the figure back in place until it clicks.
6
Set the paper drawer.
7
When the screen shown below is displayed, tap <Yes>.
LINKS
Notify to Check Paper Settings