The zazzle design tool is second to none .. its an awesome bit of kit helping you produce the best products
To create a poster with or without a frame is easy
Step One
Upload you artwork .. you can do this via the design tool itself or the zazzle uploader .. which is still in beta and works only for windows .. there is a help file to get the requirements .. of course this isn’t just for posters .. but is ideal for larger file uploads
Step Two
Your poster will now look something like this …but not with my artwork

You can see the arrows are pointing to two very large blank white areas .. it doesn’t make for a great poster / print … so what do we do?
STEP THREE
Click on the PRINT OPTIONS tab

Then select the AUTO SIZE

This will resize the back area to the size of your artwork … it will also give you the dimensions
OPTIONAL STEP FOUR
If you haven’t included a border when you created your work you still can… If you want a border area to your poster … simply go to the customize tab ( next to the print options tab ).. and hit the minimize button ( red arrow ) … then select a background color ( black arrow )

Thanks very helpfull!