Photoshop; Export New Document Presets

Solution 1:

Mac OS X:

<User>/Library/Application Support/Adobe/Adobe Photoshop CS4/Presets

Windows XP:

[Drive]:\Document and Settings\<user>\Application Data\Adobe\Adobe Photoshop CS4\Presets.

Windows Vista:

[Drive]:\Users\<user>\AppData\Roaming\Adobe\Adobe Photoshop CS4\Presets

If you're using Windows, the files are probably hidden so you need to make sure that you enable "Show hidden files and folders" (you can do this in the Control Panel > Folder Options> "View" tab).

Solution 2:

Windows 10 (Adobe Photoshop CC 2018):

%APPDATA%\Adobe\Adobe Photoshop CC 2018\Adobe Photoshop CC 2018 Settings\

File: New Doc Sizes.json

The path will depend on the installed version of your Adobe Photoshop.

You can even edit the contents of the JSON file, but obviously it is recommended that any manipulation in the file be done only with Photoshop closed, and respecting the JSON syntax / File Structure. Whereas too that version of PS don't allow edit the preset of new document using the GUI, like rename.