I want to use a template designed for one size of paper with a different paper size, is this possible?
Yes, in most cases this is possible with very good results. For example the very popular 11"x 17" has an aspect ratio almost identical to 20" x 30" so the 20" x 30" poster sized templates can very easily be used with 11 x 17 paper. All you have to do is resize your template maintaining the original pixel dimensions (to do this in PhotoShop you remove the check from the resample box, in Corel PhotoPaint you check the maintain original size box) and then increase the dpi from the 20" x 30"s 200 dpi to 360 dpi and the image should now be 11.11" x 16.67". There is sufficient white border on most of these templates to take the extra 0.11". If for the 20" x 30" 200 dpi calendars you increase the dpi to 470, the calendar will be approximately 8.5" x 12.8" and suitable for printing on 8.5" x 14" paper. The aspect ratio of the 20" x 30" (1:1.5) is significantly different from that of the 8.5" x 11" (1:1.3) so if you resize in this case you'll end up with a larger margin than you would probably like along the long axis, as the image will be 7.3" x 11". However, you could resize the template differently in the X and Y planes (you will probably have to remove a check from a box with a heading something like constrain proportions or maintain proportions or aspect ratio to do this) and make any template fit any paper and the distort of the text will probably not be too noticeable. One PROBLEM you may encounter though is that when templates designed for large prints are printed small the text may print smaller than you'd like. A simpler method to fit a template to another size of paper is just to use print preview and drag the edges to fit. Remember though, any time you change the aspect ratio it will degrade the sharpness of the text to some extent, but this is probably well tolerated as the original files are very sharp. A draft print of cheap paper is probably a good idea to check the product.
