This sample demonstrates how you can change the default symbol of the zoom rectangle that appears when you press Shift while clicking and dragging the mouse. You can define any fill symbol as the zoomSymbol in esriConfig, as shown in this line:
esriConfig.defaults.map.zoomSymbol = {"color":[255,255,255,127],"outline":{"color":[255,0,0,255],"width":1.5,"style":"esriSLSDash"},"style":"esriSFSSolid"};<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"> <title>Customize Map Zoom Rectangle Symbol</title> <link rel="stylesheet" href="https://js.arcgis.com/3.26/dijit/themes/claro/claro.css"> <link rel="stylesheet" href="https://js.arcgis.com/3.26/esri/css/esri.css"> <script src="https://js.arcgis.com/3.26/"></script> <script> dojo.require("esri.map"); var map; function init() { // configure map zoom rectangle by creating a symbol, // converting to JSON and specifying it as the default zoomSymbol var sfs = esri.symbol.SimpleFillSymbol; var sls = esri.symbol.SimpleLineSymbol; var zoomSymbol = new sfs( "solid", new sls("dashdot", new dojo.Color([0,0,255]), 2), new dojo.Color([255,255,0,0.5]) ); esri.config.defaults.map.zoomSymbol = zoomSymbol.toJson(); map = new esri.Map("map", { center: [-34.102, 43.197], zoom: 3 }); map.addLayer(new esri.layers.ArcGISTiledMapServiceLayer("https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer")); } dojo.ready(init); </script> </head> <body class="claro"> Configure map zoom rectangle symbol <div id="map" style="width:1024px; height:512px; border:1px solid #000;"></div> </body> </html>