This article will show you how to print a document as a poster. This will let you blow up an image by using multiple sheets of paper to form an image instead of one sheet.
1) Find the picture/file that you wish to make into a poster. This needs to be in .pdf format to use this method. If the file is not in .pdf format, go to google search for a .pdf converter. There are many free and easy to use converters on the internet that will convert the file instantly. An alternative is to save the file as a .pdf. Go to file>save as> and make sure the file format is .pdf. In google drive you will use the "download as" under file.
2) Open the file with adobe reader. It should be the default .pdf reader. If not, right click on the file and choose open with. In that menu, Adobe Acrobat Reader should be listed.
3) The file will then open up in Adobe Reader. In adobe reader choose file>print.
4) This print dialog box will appear. Choose the poster option. There is a preview of the image in the bottom right corner. Adjust the tile scale until you get the desired size of the poster. For this image to be shared on four sheets, I have made it 150%. This can be done on multiple pages and with different pictures. Clicking on print will print out the document with the page breaks where the line marks are.