How To Create Your Own Posters Using A Printer
The printers you have installed with your computers can usually not print areas greater than that covered on the A4 size page. Printing posters therefore becomes impossible.
The only way out of this predicament is to print different rectangular portions of your poster, then merge the printed images to get the desired result. PosteRazor is a program that helps you do exactly that. The download file is just 1MB size; you can have the entire program downloaded and installed in no time. Have a look at the interface:

The first step is to load your image. The supported image formats for inputs include BMP, DDS, Dr. Halo, GIF, ICO, IFF, JBIG, JPEG/JIF, KOALA, LBM, Kodak PhotoCD, PCX, PBM, PGM, PNG, PPM, PhotoShop PSD, Sun RAS, TARGA, TIFF, WBMP, XBM, and XPM. Moreover, the supported color types include Monochrome, Grayscale, 4 Bit palette, 8 Bit palette, 24 Bit RGB, 48 Bit RGB (only via TIFF and PNG), and 32 Bit CMYK (only via TIFF).
The second step is to define the paper format:

Leaving a little space to overlap your A4 pages would be a wise decision. Therefore PosteRazor provides you with the option to leave an overlapping area blank:

Next, you decide which part of the page your image will be aligned on:

Finally, to ensure minimal loss of image quality, the result is saved as a PDF file which can be printed out later.
In these few simple steps, you can create a poster by an everyday printer with ease.
Download PosteRazor Here
This looks great. But don’t the images loose quality when up-scaling? Looks like I’m gonna be playing round with this for a while..
Not much, since the files are saved in PDF format to ensure minimal loss of image quality.