![webmap preferences webmap preferences](https://image.slidesharecdn.com/16-webmapstrutturadellasorgentepagina-150722092801-lva1-app6891/95/webmap-struttura-della-sorgente-pagina-11-638.jpg)
In the Contents window, click the down arrow for Layer Transparency and set the transparency to about 25 percent. Step Four: In the map viewer, click the Details button, and then click the Show Contents of Map button. Now that there are two features in the map notes layer, you will add some layer transparency to explore the effect on the overlapping area between the two rectangles. Make sure that the two rectangles overlap a little, as in the graphic below. Using the same process, add another rectangle with the same symbol. When you have modified the symbol, click Done to close the Change Symbol dialog box and click Close to close the pop-up window for your new rectangle.
![webmap preferences webmap preferences](https://monde-geospatial.com/wp-content/uploads/2016/02/make-web-maps-with-qgis-cloud.jpg)
Notice that the transparency for this symbol is 0 percent, meaning that the symbol will be completely opaque. Also change the outline color to red (any red will do).
![webmap preferences webmap preferences](https://i0.wp.com/themapden.co.uk/wp-content/uploads/2017/07/ArcGISOnline_examplle.png)
In the pop-up window, click Change Symbol and choose the first blue symbol in the palette. Step Three: In the Add Features menu, click the Rectangle tool and then click the map to add a new rectangle. For Name, type Layer Transparency, then click Create. Step Two: After changing the basemap, click Add > Add Map Notes to add a new map notes layer to the map. This will provide a lighter background to better contrast with the graphics you are going to add next. Click Basemap and switch the basemap to the Light Gray Canvas. Step One: Open ArcGIS Online () and click Map to open the map viewer. Here is a quick exercise you can perform in ArcGIS Online to illustrate the cartographic differences in the two types of transparencies so you can effectively choose which one works best in your web map. So before choosing to use color transparency based on performance benefits alone, you should verify that this blending effect is cartographically appropriate for your map. That may confuse or mislead your map users. However, color transparency will also blend the colors of transparent symbols that overlap, resulting in symbology that is not in your legend.
![webmap preferences webmap preferences](https://image.slidesharecdn.com/16-webmapstrutturadellasorgentepagina-150722092801-lva1-app6891/95/webmap-struttura-della-sorgente-pagina-10-638.jpg)
In general, color transparency will give you better rendering speed, so if drawing performance-the time it takes your layer to display in the web map-is critical to your map’s success, this could be your best choice. The transparency method you select for your web map layers is important. Color transparency, on the other hand, allows different transparency properties to be applied to individual feature symbols instead of the layer as a whole. It applies a specified transparency percentage to all the features in the layer uniformly. What is the difference between these symbol transparency methods? Layer transparency is a property of the entire map layer.
#Webmap preferences how to#
This tip explains how to use both these options so that you can choose the one that best conveys the information you want in your web map. When you create web maps in ArcGIS Online, you can use both of these two symbol transparency methods-layer transparency and color transparency. Applying transparency to symbols in a web map is a useful cartographic technique for displaying overlapping features without completely obscuring the details underneath, as this graphic of spending on alcoholic beverages in the city of Houston, Texas, illustrates.