How to:Create a blank document, and how to make a font available for editin

Question

Two questions:
1: How do I create a new PDF document? All I see is to create from an existing document or scanner. If I'm creating something from scratch, do I really have to load an existing PDF, delete everything and then start my new document? That's the way it seems, which is nuts!
2: I have tried to edit the text in a document. I did not not create it, but it is open to editing. The font used in the document is "Arial", a very common font that comes with windows. The font is installed and I use it all the time in other Adobe apps. However when I try to edit a ducument using that font, I get a message that "the font is unavailable for editing" and it substitutes some random font. So why is it not available, and how do I make it available?
Thanks!
I'm using Adobe Acrobat XI Pro v.11.0.10 with Adobe Creative Cloud 2014 and Windows 7, all shown as up to date.

Answer 1

For the first item...
Here is a sample from the Acrobat SDK - JavaScript section:
trustedNewDoc = app.trustedFunction( function (nWidth, nHeight)
        app.beginPriv();
            switch( arguments.length ) {
                case 2:
                    app.newDoc( nWidth, nHeight );
                    break;
                case 1:
                    app.newDoc( nWidth );
                    break;
                default:
                    app.newDoc();
        app.endPriv();
    app.addSubMenu({ cName: "New", cParent: "File", nPos: 0 })
    app.addMenuItem({ cName: "Letter", cParent: "New", cExec:
        "trustedNewDoc();"});
    app.addMenuItem({ cName: "A4", cParent: "New", cExec:
        "trustedNewDoc(420,595)"});
    app.addMenuItem({ cName: "Custom...", cParent: "New", cExec:
        "var nWidth = app.response({ cQuestion:'Enter Width in Points',\
            cTitle: 'Custom Page Size'});"
        +"if (nWidth == null) nWidth = 612;"   
        +"var nHeight = app.response({ cQuestion:'Enter Height in Points',\
            cTitle: 'Custom Page Size'});"
        +"if (nHeight == null) nHeight = 792;"
        +"trustedNewDoc(nWidth, nHeight) "});
Copy it into a text file and give it a name with a "*.js" file extension.
Place the JS file in the JavaScripts folder:   C:\Program Files (x86)\Adobe\Acrobat 11.0\Acrobat\Javascripts\
Relaunch Acrobat and you should have a new menu item named "New"