In my experience I found that very complex vector artwork can bloat a PDF and can’t get compressed to make it a smaller size. Check your file if you have that, and if you do try converting it to raster.

I understand. But to what measurements do you want to change it?

I think that in GREP you can’t search for end of lines, only ends of paragraphs. You would need scripting for that.

How is the situation in Illustrator?

Use the free MultiPageImporter script, it has a ton of options and one of those is to scale the PDF to any percentage before importing.

Funny, because it works by me. Maybe this is better:

var myDoc = app.activeDocument;
app.findGrepPreferences = app.changeGrepPreferences= null;
app.findGrepPreferences.findWhat = "$";
app.findGrepPreferences.appliedParagraphStyle = myDoc.paragraphStyles.item("Day entries");
var found = myDoc.findGrep();
for (var i =0; i < found.length; i++) {
	try {
	var para1 = found[i].paragraphs.firstItem();
	var para2 = para1.paragraphs[-1].insertionPoints[-1].paragraphs[0];
	if (para2.appliedParagraphStyle == myDoc.paragraphStyles.item("Date Headings"))
		para1.appliedParagraphStyle = myDoc.paragraphStyles.item("Day entries LAST");
		} catch(_){};
	}

The issue seemed to be the Word Boundary after a period (.). So I change it to a Negative Lookahead ((?!\w)) and it worked.

I also adjusted the GREP search string so that it would be more accurate, because in GREP the period . is a wildcard that stands for every letter, and is only a period if it’s preceded by a backslash. But in the script the period was never escaped out, so it would find “Fla.” but it would also find and change “Flag”! (Not good…).

So now I added a regex at the end to fix that. (As well as fixing that Wash. entry…).

//DESCRIPTION:Expand US State Abbreviations

app.doScript(doReplace, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Expand State Abbreviations");
function doReplace ()
{
var a;
var abbrevs = [
[ "Alabama", "Ala." ],
[ "Arizona", "Ariz." ],
[ "Arkansas", "Ark." ],
[ "California", "Calif." ],
[ "Colorado", "Colo." ],
[ "Connecticut", "Conn." ],
[ "Delaware", "Del." ],
[ "District Of Columbia", "D.C." ],
[ "Florida", "Fla." ],
[ "Georgia", "Ga." ],
[ "Illinois", "Ill." ],
[ "Indiana", "Ind." ],
[ "Kansas", "Kan." ],
[ "Kentucky", "Ky." ],
[ "Louisiana", "La." ],
[ "Maryland", "Md." ],
[ "Massachusetts", "Mass." ],
[ "Michigan", "Mich." ],
[ "Minnesota", "Minn." ],
[ "Mississippi", "Miss." ],
[ "Missouri", "Mo." ],
[ "Montana", "Mont." ],
[ "Nebraska", "Neb." ],
[ "Nevada", "Nev." ],
[ "New Hampshire", "N.H." ],
[ "New Jersey", "N.J." ],
[ "New Mexico", "N.M." ],
[ "New York", "N.Y." ],
[ "North Carolina", "N.C." ],
[ "North Dakota", "N.D." ],
[ "Oklahoma", "Okla." ],
[ "Oregon", "Ore." ],
[ "Pennsylvania", "Pa." ],
[ "Rhode Island", "R.I." ],
[ "South Carolina", "S.C." ],
[ "South Dakota", "S.D." ],
[ "Tennessee", "Tenn." ],
[ "Vermont", "Vt." ],
[ "Virginia", "Va." ],
[ "Washington", "Wash." ],
[ "West Virginia", "W.Va." ],
[ "Wisconsin", "Wis." ],
[ "Wyoming", "Wyo." ] ];

app.findGrepPreferences = app.changeGrepPreferences = null;
for (a in abbrevs)
{
	var myString = abbrevs[a][1].replace(/\./g, '.');
	app.findGrepPreferences.findWhat = "b" + myString+ "(?!w)";
	app.changeGrepPreferences.changeTo = abbrevs[a][0];
	app.findGrepPreferences.appliedParagraphStyle = app.activeDocument.paragraphStyles.item("scholarship winner");
	app.activeDocument.changeGrep();
	}
app.findGrepPreferences = app.changeGrepPreferences = null;
}