Sub FormatManualNumbering()
Dim rng As range
Dim rngEnd As Long

Application.ScreenUpdating = False

    If selection.Type = wdSelectionIP Then
       MsgBox Prompt:="You have not selected any text!"
       Exit Sub
    End If
    Set rng = selection.range
    rngEnd = rng.End

    selection.range.InsertBefore vbCr
    With rng.Find
       .ClearFormatting
       .Replacement.ClearFormatting
       .Forward = True
       .Wrap = wdFindStop
       .Format = False
       .MatchWildcards = False
'Remove spaces starting paras:
       .text = "^p^w"
       .Replacement.text = "^p"
       .Execute Replace:=wdReplaceAll
'Remove spaces before para signs:
       .text = "^w^p"
       .Replacement.text = "^p"
       .Execute Replace:=wdReplaceAll
'Remove empty paras:
       .MatchWildcards = True
       .text = "^13{2,}"
       .Replacement.text = "^p"
       .Execute Replace:=wdReplaceAll
'Insert a tab before any 1st letter in a para:
       .text = "(^13[!^13]@)([A-Za-z])"
       .Replacement.text = "\1^t\2"
       .Execute Replace:=wdReplaceAll
'Replace two tabs with one tab:
       .text = "^t^t"
       .Replacement.text = "^t"
       .Execute Replace:=wdReplaceAll
'Delete tabs between letters, which have been inserted using
'the code to insert a tab before any 1st letter in a para previously:
       .text = "([A-Za-z])^t([A-Za-z])"
       .Replacement.text = "\1\2"
       .Execute Replace:=wdReplaceAll
    End With
    Set rng = selection.range
    Do
        With rng.Find
            .ClearFormatting
            .Replacement.ClearFormatting
            .Forward = True
            .Wrap = wdFindStop
            .Format = True
            .MatchWildcards = True
'Find a str between a tab & the nearest previous para sign, i.e.
'a str between a para sign & a tab, excluding other paras in-between:
            .text = "^13[!^13]@^t"
            If .Execute And rng.End <= rngEnd Then
                .text = "[,:; ]"
                .Replacement.text = "."
                .Execute Replace:=wdReplaceAll
            Else: Exit Do
            End If
'Delete all periods immediately before a tab:
            While rng.Characters.Last.Previous = "."
                rng.Characters.Last.Previous.Delete
            Wend
            rng.Collapse wdCollapseEnd
        End With
    Loop
'Reset rng (see the comment above):
    Set rng = selection.range
    With rng.Find
           .ClearFormatting
           .Replacement.ClearFormatting
           .Forward = True
           .Wrap = wdFindStop
           .Format = True
           .MatchWildcards = True
'Insert periods after lone 1st-level numberings:
           .text = "(^13[0-9]{1,})^t"
           .Replacement.text = "\1.^t"
           .Execute Replace:=wdReplaceAll
'Delete extra periods in the doc:
           .text = "[.]{2,}"
           .Replacement.text = "."
           .Execute Replace:=wdReplaceAll
'Delete tab after opening bracket:
           .text = "(^13[(])^t"
           .Replacement.text = "\1"
           .Execute Replace:=wdReplaceAll
'Delete tab after opening double quote (Chr(34) & Chr(147)) after para marks:
           .text = "(^13" & "[" & Chr(34) & Chr(147) & "]" & ")^t"
           .Replacement.text = "\1"
           .Execute Replace:=wdReplaceAll
    End With
'Delete the doc's starting para sign inserted previously:
    selection.range.Characters.First.Delete
 Application.ScreenUpdating = True
MsgBox "Complete"
  
Set rng = Nothing
End Sub