How to do poster printing

My solution:  just take it to a big store that has wide poster printers.   I find that poster printing in PSE leaves a bit to be desired.

The ability to print a multi-page poster depends on the capability of your printer.  If your printer does handle this form of printing, do the following:

1. Click on Change Settings in the Print dialog. 
2. In the dialog that opens, click on Advanced Settings.  This will open your Printer Driver's settings.
3. You should find the Poster choices under the Multi-Page menu.

Here is what it looks like for my Epson printer:

You may also need to make some choices in the other Print dialog settings, such as Crop to Fit and Print Size (which should probably be Custom).