You can use canva for free. When you are creating a design you have to select the size first. In this project I selected Poster. Then print it in poster size as well. My printer only print A4 so the printer will automatically print it into multiple papers. All you have to do is connect them together.
To print it, just click the poster option under the Paper sizing and handling. Then you can also change the scale. For every tiles corresponds to an A4 paper. For this, I scale it to 6 tiles. If you can’t find the poster option you’ll need to download the Adobe acrobat reader. Thank you for watching!