diff --git a/types/plotly.js/index.d.ts b/types/plotly.js/index.d.ts
index f1364f1845..e9b06ed64b 100644
--- a/types/plotly.js/index.d.ts
+++ b/types/plotly.js/index.d.ts
@@ -261,6 +261,8 @@ export interface Layout {
 	'xaxis.type': AxisType;
 	'xaxis.autorange': boolean;
 	'yaxis.autorange': boolean;
+	'xaxis.title': string;
+	'yaxis.title': string;
 	ternary: {}; // TODO
 	geo: {}; // TODO
 	mapbox: {}; // TODO
@@ -518,10 +520,11 @@ export interface PlotData {
 	'line.smoothing': number;
 	'line.simplify': boolean;
 	marker: Partial<PlotMarker>;
-	'marker.symbol': string | string[]; // Drawing.symbolList
+	'marker.symbol': MarkerSymbol | MarkerSymbol[];
 	'marker.color': Color;
+	'marker.colorscale': ColorScale | ColorScale[];
 	'marker.opacity': number | number[];
-	'marker.size': number | number[];
+	'marker.size': number | number[] | number[][];
 	'marker.maxdisplayed': number;
 	'marker.sizeref': number;
 	'marker.sizemax': number;
@@ -529,6 +532,8 @@ export interface PlotData {
 	'marker.sizemode': 'diameter' | 'area';
 	'marker.showscale': boolean;
 	'marker.line': Partial<ScatterMarkerLine>;
+	'marker.line.color': Color;
+	'marker.line.colorscale': ColorScale | ColorScale[];
 	'marker.colorbar': {}; // TODO
 	'marker.pad.t': number;
 	'marker.pad.b': number;
@@ -715,13 +720,16 @@ export interface ColorBar {
 	tickvalssrc: any;
 	ticktextsrc: any;
 }
+
+export type MarkerSymbol = string | number | Array<(string | number)>;
+
 /**
  * Any combination of "x", "y", "z", "text", "name" joined with a "+" OR "all" or "none" or "skip".
  * examples: "x", "y", "x+y", "x+y+z", "all"
  * default: "all"
  */
 export interface PlotMarker {
-	symbol: string | string[]; // Drawing.symbolList
+	symbol: MarkerSymbol;
 	color: Color | Color[];
 	colors: Color[];
 	colorscale: ColorScale;