Need Help for Layout

Question

I am preparing pdf's with an image, a description and a QR code linking to that image hosted on the web.

However for now the QR code is always positioned just bellow the description. I would like to have it always at the same position at the bottom right, not matter how long the description is.

m = Import[
       "https://images.pexels.com/photos/36455/rose-red-flower-victor-\
    hugo.jpg?cs=srgb&dl=flora-floral-flower-36455.jpg&fm=jpg"];
    exportIm = 
     Panel[Style[
       Grid[{{m, 
          SpanFromLeft}, {TextCell[
           Row[{"balabalaablabalb balabalbalbalba"}], 
           TextJustification -> 1, Hyphenation -> False], 
          SpanFromLeft}, {}, {"Notes: "}, {SpanFromLeft, 
          Item[BarcodeImage["123456789", "QR", 7], Alignment -> Right]}}, 
        Frame -> {{False, False}, {True, True, True, False}, {False}}, 
        BaseStyle -> ImageSizeMultipliers -> 1], 7, 
       FontFamily -> "Helvetica", Background -> Gray], Background -> Gray,
       ImageSize -> {210, 297}*2]

Generates:

But what I would like is (QR code bottom right):

Answer 1

Change {SpanFromLeft, Item[BarcodeImage["123456789", "QR", 7], Alignment -> Right]} to

{Item[BarcodeImage["123456789", "QR", 7], Alignment -> Right], SpanFromLeft}

and {"Notes:"} to

{Item["Notes:", Alignment -> { Left, Top}, ItemSize -> {Full, Scaled[.65]}]}

to get