Browse to the sublayer that contains the features you want to label.
Open the map in the map viewer, click Details, and click Contents.Verify that you are signed in and have privileges to create content.You can create labels for features in hosted feature layers, ArcGIS Server feature service layers, individual layers from ArcGIS Server map service layers, CSV on the web, and layers from files. Thus, dynamic labeling is best suited for maps where you don’t need precise control and only want to label a few layers. There is no guarantee that you’ll get the labels you want positioned exactly where you want them. Layers at the top get labeled first and thus, will have the most labels. Labeling priority follows the layer order in your map from top to bottom. As you zoom in to an area, more labels will dynamically appear. Thus, in areas where features are tightly clustered, some features may not get labeled. The map viewer places as many labels on the map as possible without overlapping them. You can control the text size, color, and style to help differentiate labels from different layers. The map viewer automatically places labels on the map on or near the features they describe. To display labels for a layer, select one or more attributes you want to show, for example, the name or type of feature. The text for a label is usually derived from the layer attributes. Labels are short pieces of text that describe features in a layer and help your audience understand what they are looking at. The way you draw your layers helps to describe and identify features, but sometimes you need more than just a particular symbol or color or to convey what you want to say with your map.
The documentation for an individual tool is often referred to as the tool reference page.Maps can display large amounts of geographic data in layers that generally overlap. The documentation often contains illustrations and will have links to other relevant topics. Every tool is documented the same way there is a short summary, notes about the usage of the tool, and a section on the exact syntax of the tool. This book contains documentation for all tools. In the help system, expand the Geoprocessing book and the Geoprocessing tool reference book. One effective way to learn about tools is to simply browse through the documentation. This topic provides an in-depth look at common tools and their uses. The first place you should start is with An introduction to the commonly used GIS tools. The purpose of this document is to guide you to various other documents that describe the purpose and use of various tools. Given the number of tools, it's beyond the scope of any single document to explain them all. There are literally hundreds of tools, and learning what tool to use when takes time. This was an iterative process lasting many years (and is still ongoing) that has refined the tools into the set of simple and elemental operators that are installed with ArcGIS. The tasks in these early flowcharts evolved into software and have become the core set of geoprocessing tools you see today. In those days, when geographic analysts were trying to solve real-world problems, they would gather around a whiteboard (or probably a chalkboard back then) and create flowcharts and diagrams very similar to those created with ModelBuilder today. Geoprocessing tools have been evolving since before the days of modern GIS technology.