Quick Delphi plugin to change font size in the Object Inspector. Not perfect, has quirks. Use at your own risk.

OIFontTweakMain.pas

unit OIFontTweakMain;

interface

uses Vcl.Forms, Vcl.Controls, Vcl.Dialogs, Vcl.StdCtrls;

procedure Register;

implementation

function GetOIForm: TForm;
var
  I: Integer;
begin
  Result := nil;
  for I := 0 to Screen.FormCount - 1 do
  begin
    if Screen.Forms[I].Name = 'PropertyInspector' then
    begin
      Result := Screen.Forms[I];
      Exit;
    end;
  end;
end;

function GetChildControl(AParent: TWinControl; AName: string): TWinControl;
var
  I: Integer;
begin
  Result := nil;
  for I := 0 to AParent.ControlCount - 1 do
  begin
    if AParent.Controls[I].Name = AName then
    begin
      Result := TWinControl(AParent.Controls[I]);
      Exit;
    end;
  end;
end;

function GetOIControl: TCustomListBox;
var
  OIForm: TForm;
begin
  OIForm := GetOIForm;
  Result := TCustomListBox(GetChildControl(GetChildControl(OIForm,
            'Panel3'), 'PropList'));
end;

procedure Register;
var
  I, J: Integer;
  OI: TListBox;
begin
  OI := TListBox(GetOIControl);
  OI.Font.Size := 14;
  OI.ItemHeight := 24;
end;

end.

very nice - thank you !
Do you know by chance also the names for the tool palette and the project manager ?