What is the recommended format and size for the picture widget ?

[LGDL]

I can't seem to find any details about the Picture widget. What format & size work best ?

[vpx]

There is no documentation but it's in the source code:

Code Select Expand

        if ($_FILES['pictfile']['size'] > (10 * 1024 * 1024)) {
            $input_errors[] = gettext("The image file is too large. Please upload something smaller than 10MB.");
So file size is limited to 10 MB. I don't see a pixel limit.

I don't know if transparency is supported but I would suggest .png or .gif format for logos and .jpg for photos.