how can I convert a Grid object to a Graphics object?

Question

I have a figure (which is by combining different plots) that I generated using Grid[]. The problem is, I want to specify the ImageSize of this final figure. I am unable to do it in Grid[]. Therefore, I wanted to convert this Grid[] object to Graphics[] object so that I can save it as a PDF of desired ImageSize.

Note: I tried to save the output of Grid[] as PDF using Export[]. It works fine. However, when I set ImageSize in Export[], it seems to be ignored.

I tried

i=First@ImportString[ExportString[figure, "PDF"]];

But even this seems to lose clarity but this gives crispier image than Rasterize

Magnify[] seems to do what I want even if It doesn't convert the figure to graphics, I can change the resolution by trial and error. Not the best way to do it but gets the job done.

Answer 1

I am still confused about this question. I am posting this just to understand better what is wrong again with using GraphicsGrid or Magnify as was suggested above? Here is just an example. Why this does not work? It is also easy to use ItemSize to control the size of each entry in the GraphicsGrid if needed.

SetDirectory[NotebookDirectory[]];
Manipulate[
 s = Which[method == "GraphicsGrid",
   GraphicsGrid[tbl, Frame -> All, Spacings -> {.5, .5},ImageSize -> n],
   method == "Magnify", Magnify[Grid[tbl, Frame -> All], n/500]
   ],

 {{n, 300, "how big?"}, 200, 1000, 10, Appearance -> "Labeled"},
 {{method, "GraphicsGrid"}, {"Magnify", "GraphicsGrid"}},
 Button["Export to PDF", Export["s.pdf", s]],
 Initialization :>
  (
   tbl = Table[ListPlot[RandomReal[{0, 1}, 10],Joined->True,ImageSize->100], {3}, {3}]
   )
 ]