SetOptions[ListDensityPlot,
        Mesh -> None,
        PlotRange -> All,
        ColorFunctionScaling -> True,
        Frame -> True,
        BaseStyle -> {FontSize -> 18, FontFamily -> "Arial"},
        LabelStyle -> Directive[Black, FontSize -> 20],
        ImageSize -> UpTo[550]

      ];

data = Table[{#, #2, Sin[#] Cos[#2]} & @@ RandomReal[{-3, 3}, 2], {1000}];

graph = ListDensityPlot[data,
  PlotLabel -> FileBaseName[file],
  ScalingFunctions -> {"Linear", "Linear", "Linear"},
  ColorFunction -> (ColorData["TemperatureMap"][#] &),
  PlotLegends -> BarLegend[Automatic,  LegendMarkerSize -> 300, LabelingFunction -> (Style[NumberForm[#, {Infinity, 2}], Black, 20] &)]]