Editing multiple annottions

#pragma TextEncoding = "Windows-1252"
#pragma rtGlobals=3     // Use modern global access method and strict wave access.
#include <AnnotationInfo Procs>
 
Window TestGraph0() : Graph
    PauseUpdate; Silent 1       // building window...
    Display /W=(155.25,51.5,549.75,260) jack
    ModifyGraph zColor(jack)={jack,*,*,Grays}
    TextBox/C/N=text0/A=MC/X=0.46/Y=18.96 "\\Z18This is an annotation with a fixed size"
    TextBox/C/N=text1/A=MC/X=-25.23/Y=44.55 "This is an annotation with no size"
    TextBox/C/N=text2/A=MC/X=-3.24/Y=-3.32 "\\Zr150This is an annotation with a relative font size"
    Tag/C/N=text3/X=1.62/Y=-16.11 jack, 38, "Tag with default font size"
    Tag/C/N=text4/X=6.12/Y=4.86 bottom, 64, "tag connected to bottom axis"
    ColorScale/C/N=text5/A=MC/X=43.75/Y=13.74 trace=jack
    AppendText "Default size axis text"
    Legend/C/N=text6/J/X=24.77/Y=11.37 "\\s(jack) jack is a legend (default font size)"
EndMacro
 
Menu "Graph"
    "-"
    Submenu "Annotation Font Sizes"
        "6 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 6, 0)
        "8 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 8, 0)
        "10 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 10, 0)
        "12 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 12, 0)
        "16 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 16, 0)
        "24 points",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 24, 0)
        "-"
        "50%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 50, 1)
        "66%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 66, 1)
        "75%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 75, 1)
        "88%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 88, 1)
        "\\M0::100% (default)",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 0, 0)
        "125%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 125, 1)
        "150%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 150, 1)
        "175%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 175, 1)
        "200%",/Q,  ChangeAnnotationsFontSize(WinName(0,1), 200, 1)
    End
    "-"
End
 
Function ChangeAnnotationsFontSize(win, newFontSize, isRelative)
    String win // graph or layout
    Variable newFontSize // points or percent. Use 0 to remove font size from annotation.
    Variable isRelative // if true, then newFontSize is relative font size in percent
 
    String list = AnnotationList(win)
    Variable i, numBoxes = ItemsInList(list)
    for(i=0;i<numBoxes;i+=1)
        String thisBox = StringFromList( i, list )
        String infoStr = AnnotationInfo(win, thisBox )
        String text = AnnotationText(infoStr)
        text= RewriteAnnotationTextSize(text, newFontSize, isRelative)
        String type = AnnotationType(infoStr) //  "Tag", "TextBox", "ColorScale", or "Legend"
        String cmd=""
        strswitch(type)
            case "Tag":
                String ywave= AnnotationYWave(infoStr)
                Variable xAttach= AnnotationAttachX(infoStr)
                sprintf cmd, "%s/C/N=%s %s, %.14g, \"%s\"", type, thisBox, ywave, xAttach, text
                break
            case "ColorScale":
                // ColorScales have a font size that's normally 0 (graph font size)
                // in addition to the axis label \Z stuff
                // so they're not adjusted here.
                break   // comment out this line to treat the axis label of a Colorscale just like a Textbox
            default:
                sprintf cmd, "%s/C/N=%s \"%s\"", type, thisBox, text
                break
        endswitch
        if( strlen(cmd) )
            Execute/Q/Z cmd // remove /Q if you want to see the executed commands
            //Print cmd
        endif
    endfor
 
End
 
 
Function/S RewriteAnnotationTextSize(text, newFontSize, isRelative)
    String text         // TextBox/C/N=text2/A=MC/X=-3.24/Y=-3.32 "\\Zr150This is an annotation with a relative font size"
    Variable newFontSize    // 0 to remove font size, 18 for 18 point, 150 for 150%
    Variable isRelative     // if true, then newFontSize is relative font size in percent
    
    // rewrites only the initial font size escape code in the text.
    Variable slashZrStartPos = strsearch(text, "\\\\Zr" , 0)
    Variable slashZStartPos = strsearch(text, "\\\\Z" , 0)
    // handle the case where the text has both \\Z and \\Zr
    Variable startPos, endPos, foundRelative=0
    if( slashZrStartPos >= 0 && slashZStartPos >= 0 )
        if( slashZrStartPos <= slashZStartPos ) // == if only \\Zr
            startPos= slashZrStartPos
            foundRelative=1
        else
            startPos= slashZStartPos
        endif
    elseif(slashZrStartPos >= 0)
        startPos= slashZrStartPos
        foundRelative=1
    else
        startPos= slashZStartPos
    endif
    if( startPos >= 0 ) // \\Z found
        if( foundRelative )
            endPos = startPos + strlen("\\\\Zrnnn")-1 // note: strlen("\\Z") is only 2
        else
            endPos = startPos + strlen("\\\\Zdd")-1
        endif
    endif
    
    String replaceWith=""
    if( newFontSize )
        if( isRelative )
            sprintf replaceWith, "\\\\Zr%03d", newFontSize
        else
            sprintf replaceWith, "\\\\Z%02d", newFontSize
        endif
    endif
    if( startPos < 0 )
        text = replaceWith + text
    else
        text[startPos, endPos] = replaceWith
    endif
    
    return text
End