This free program lets you take an image and enlarge it to print on multiple sheets of paper to any any height or width you want.
Launch a web browser and go to the Posterrazor website. When the page appears, click the Download link on the left-hand side followed by the ‘Windows version (Installer)’ link. If the File Download Security Warning dialogue box appears, click Save and choose a location for the downloaded file.
Firefox users should select Save File to save the download to Firefox’s default download folder. Now locate and double-click the downloaded file and follow the wizard’s prompts to complete installation.
At the last dialogue box, click Finish to launch the program. Click the Browse (folder icon) button below the Input image label and use the Windows Explorer dialogue to find and open an image file to use for the poster.
Posterazor displays a preview of the image alongside some image information, including its size, resolution and colour depth. Now click Next.
From the Format dropdown menu, choose the paper format supported by your printer (typically A4, which is the default option) along with the printing orientation. For custom paper size, click the Custom tab and type in the required dimensions.
By default the poster-sized image is given a border of 1.5cm all around it, but this can be altered by changing the numbers in the Borders section. Click Next.
Now choose the amount of overlap needed between the individual sheets that make up the poster (this allows the sheets to be stuck together more easily). By default this is set at 1cm all around the edges of the four or more pages that make up the poster.
Change the amount of overlap by typing a different number besides height and width.
Use the buttons below this to adjust the position of the overlapping parts of the print, according to each sheet. In most cases sticking with the default options will be fine.
Click Next and set the final poster size. This can be in absolute size, set in centimetres, a percentage of the original image or expressed in page units (width by height). Choose the measurement to use (by clicking the relevant radio button) and then use the controls to alter the size.
Finally here, choose an image-alignment option to set where the picture will be sit among the multiple pages – centred makes most sense. Click Next.
Ensure the box marked ‘Launch PDF application after the poster is saved’ is ticked. Click the Save button below the Save the poster heading (it actually looks more like a slider). Browse to the location to save the file.
If in doubt, choose the Desktop. Type in a file name and click Save. The default PDF-viewer application will launch, displaying the poster split across the number of pages selected in the earlier steps. Check it over to ensure the correct amount of overlap is present.
Scroll through each of the pages in the PDF viewer. If all looks well, click the Print button to output the poster to the default printer.
Once all the pages have successfully printed, line them up so the areas of overlap cover one another. You may have to trim some of the margins off the prints so they line up properly.
Use glue or tape to stick the pages together to make one large poster, ready to be displayed for all to see.