Cannon pixma mg2120 Turn Enable bi-directional support on in the printer's Properties dialog box.

SOURCE: trying to print to a

Bidirectional Printing - A means of printing by a computer printer which prints one line from left to right, then the following line from right to left. Such printing is faster than printing in one direction only, as there is no need to wait for the carriage or other imaging mechanism to return to the left margin before starting a line.
how to enable bi-directional printing.here's how:

1. -click on start
2. -click on printers and faxes (control panel->printers and faxes)
3. -right-click on Dell Photo All in One Printer 964 All-In-One icon
4. - click on properties
5. -click on ports tab
6. -down at the bottom there's a small box before bi-directional support
7. -tick the box to enable it then click apply,ok
8. -try printing again