Iwas asked recently to make an action that will create a new document for Scrapbook size (12” x 12”).  In the North American version of Elements 8, that size is already there as a preset (click File>New>Blank , and choose it from the drop menu) so there’s no need for an action (although I can make one if you really want it….)

If you live in a place that isn’t the US, you can add this size by copying and pasting the code below into the file mentioned.

Open the file Default New Doc Sizes.txt located here in PSE 7 & 8:
Program Files\Adobe\Photoshop Elements #\Locales\[your locale]\Support Files\
Scroll to the bottom of it (or within another section of the file - it will appear in the menu wherever you put it in this file):

;----------------------------------------------------------------------
; Standard scrapbook sizes
;----------------------------------------------------------------------
"scrapbook"
"12 in x 12 in" 12.0 12.0 inches 300 dpi unchanged 0 1.0
"8 in x 8 in" 8.0 8.0 inches 300 dpi unchanged 0 1.0
"6 in x 6 in" 6.0 6.0 inches 300 dpi unchanged 0 1.0
　

If you want to add additional sizes, copy the format above and add the size you want. For a 5 in x 5 in 300 dpi document, for example, you would just add the line

"5 in x 5 in" 5.0 5.0 inches 300 dpi unchanged 0 1.0

If you will never, ever use a 6 x 6 or 8 x 8 document, simply place a ';' at the beginning of those lines to force PSE to ignore them.

I like to make custom thumbnails, and even though PSE doesn’t care what size the .png is (see this article for reference), I like to keep them a common size – 64 x 64 px is the old standard.

So to my file, I added

"64 x 64"                     64     64    pixels    screen dpi RGB 8 1.0

and my preset is there.

One final note – be sure to save the file in Unicode format, or Elements won’t be able to read it.  Also, be sure to save a backup of the original just restore if anything goes wrong!