Printing one line on every other page

Doesn't sound like your printer hardware. Try printing something other than your text document. If the page comes out clean/perfect then it means your printer is having a problem understanding your text document via print program translation. Otherwise try converting your text to pdf and print a sample page, if it works then again problem with software/printer translation.

Have you checked the print que
Printer problems can be a real hassle.
From time to time, due to document layout or settings on your computer, in your software of choice, or even on your printer, a blank page may get "printed" with the rest of your document.
Fortunately, this issue is a simple one to troubleshoot.
Click "Print Preview" when you are finished with your document and ready to print.
Observe your document.
If you see an extra, blank page, you have created a second page.
To delete the second page, close Print Preview, go back into the document and eliminate any blank lines in your documents that you may not need.
You may also find an inadvertent page break at the end of your document.
Place your cursor on its symbol and delete it.
Locate the symbol by clicking on the Show Formatting paragraph icon in the toolbar.


Circumvent this "ghost page" if you do not see a second (or additional) blank page in Print Preview.

Specify the number of pages you wish to print, within the Print dialogue box.
This is typically done by selecting the "Print From" option, then entering the page numbers desired.
If your document happens to be ten pages (without, of course, that final blank page), then enter in the "Print From" field the numbers "1-10".
This will print only pages 1 through 10, without an eleventh (blank) page.

What type of document are you trying to print(PDF, MS Word doc, etc)?
Is the printer connected via USB cable, Bluetooth?

First thing I would do is try printing a different document or even a different type of document.
If printing different documents results in the same problem then I would uninstall the current drivers, download the latest drivers from Canon, then install those drivers and try printing again.
Also, if the printer is connected to your computer via USB cable verify the cable has no exposed wiring or try a different USB cable.

Best Answer -
That entirely depends on what you are printing. A printerwill only produce what it is given.

If you are printing your own document then you change the font in the documentbefore printing or select the font before you start.

However I suspect the reason you are asking this is because you are printing apdf document from the internet. In which case the font is fixed.

If so, then you will have to copy and paste the document in to a word processorlike Word, highlight it all and the increase the font. You will then have toreformat the whole document as the increased font will throw the orginalformatting all out of line.

When you have straightened it all up then print it off.
ALTERNATIVELY, if you are printing on ordinary web page then you need to follow the below instruction
Instructions
1. 1 Go to theweb page that you want to print and right-click it. Click "PrintPreview." If you want to print part of the page, highlight the contentthat you want to print and right-click the selection. Click "PrintPreview." 2. 2 Click the "Page Setup" icon located onthe top of the Print Preview window to launch the Page Setup dialog box. Click"Change Font." 3. 3 Select the font you want to use in the"Size" window. If you want to change the font type, make yourselection in the "Font" window. Click "OK" to save thechanges and click "OK" again. 4. 4 Turn on your printer if it is not on. Click the"Print" icon on the Print Preview window to print your web page.

Print a test page and perform head clean if necessary.

The MP610 does support duplex printing.

Duplex Printing

The duplex printing function allows you to print data on both sides of a sheet of paper.
The procedure for performing duplex printing is as follows:
Performing automatic duplex printing
You can perform the duplex printing without having to turn over the paper.
1. Open the printer driver setup window, check the Duplex Printing check box, and confirm that Automatic is checked.

2. Select Normal-size Printing (or Fit-to-Page Printing, Scaled Printing or Page Layout Printing) from the Page Layout list.
3. When printing a document that has small margins, click Print Area Setup... and set the print area.
When you perform duplex printing, the print area of the document becomes slightly narrower than usual and the document may not fit on one page.

To print without reducing the page:
Select Use normal-size printing.
To reduce the page slightly during printing:
Select Use reduced printing.
4. Specify Staple Side.
The printer analyzes the Orientation and Page Layout settings, and automatically selects the best staple position. Check the Staple Side setting. If you want to change the setting, select another value from the list.
5. If necessary, click Specify Margin... and set the Margin width.
6. Click OK.
Duplex printing will be started.

Performing duplex printing manually
You can perform the duplex printing manually.
1. Check the Duplex Printing check box and uncheck the Automatic check box on the Page Setup tab.

2. Select Normal-size Printing (or Fit-to-Page Printing, Scaled Printing or Page Layout Printing) from the Page Layout list.
3. Specify Staple Side.
The printer analyzes the Orientation and Page Layout settings, and automatically selects the best staple position. Check the Staple Side setting. If you want to change the setting, select another value from the list.
4. If necessary, click Specify Margin... and set the Margin width.
5. Click OK.
If a media type other than Photo Paper Plus Double Sided is selected for Media Type on the Main tab:
When you execute print, the document will be printed on one side of a sheet of paper. When printing is complete, reload paper according to the displayed message and then click OK. The document will be printed on the opposite side.
If Photo Paper Plus Double Sided is selected for Media Type on the Main tab:
When you execute print, the document will be printed front and back alternately for one sheet at a time. Load the paper according to the displayed messages.
Note Duplex Printing is unavailable when:
- A media type other than Plain Paper, Photo Paper Plus Double Sided or Hagaki is selected from the Media Type list.
- Poster Printing is selected from the Page Layout list.
When Booklet Printing is selected from the Page Layout list, Duplex Printing and Staple Side appear grayed out and are unavailable.
After printing the front page, there is an ink drying wait time before starting to print the back page (Operation stops temporarily). Do not touch the paper during the time. You can change the Ink Drying Wait Time at Custom Settings on the Maintenance tab of the printer driver.
When you perform the automatic duplex printing for Hagaki, print an address first and then print your message.
Tip If you select Photo Paper Plus Double Sided for Media Type on the Main tab, the Duplex Printing check box on the Page Setup tab is not checked automatically. To perform duplex printing, check the Duplex Printing check box.
If the Media Type dialog box appears when performing borderless printing during duplex printing, select Plain Paper or Photo Paper Plus Double Sided.
When performing the automatic duplex printing, do not use any plain paper smaller than A5. Also, do not select any type of paper other than Plain Paper, Photo Paper Plus Double Sided or Hagaki at Media Type.
Photo Paper Plus Double Sided is highly recommended for printing photographs on both sides of a page.
If the back side of the paper becomes smudged during duplex printing, perform Bottom Plate Cleaning in the Maintenance tab.

If you have a spare USB cable around the house, try that first and see if the cable was bad.

Current printers do not have a 'built-in' font or character set. The printers only print what they are told to print by the application from which they are printing. What program are you printing from? Does it do this with all programs? Check printing from very basic programs like Notepad or Wordpad (print documents that are at least a couple of pages long). If the printer prints correctly from there, you may need to contact the publisher of the program that is giving you the weird printing.

well..did you run a test page?

or clean the print heads?

or recalibrate them?

recommend all these steps for you

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by dragging the black bar on the left with your mouse when
the cursor changes for resize