Now that we have set up QGIS, let's get accustomed to the interface. The following screenshot shows a breakdown of QGIS. The main part of the screen is dominated by the map display, which can be adjusted as needed.

The Processing Toolbox can be added by clicking View | Panels | Processing Toolbox:

The biggest area is reserved for the map. To the left of the map, there are the Layers and Browser panels. Under the map, we can see the information bar, which includes (from left to right):

• Search box
• The current map Coordinate
• Map scale
• Magnifier
• Rotation
• A checkbox for render
• The project coordinate reference system (CRS)
• Messages (logs)
• Updates available for plugins

In this screenshot, EPSG:4326 is shown. On the right side is the Processing Toolbox, which also has a search function. Finally, at the top of QGIS, you can see the project title (as yet unnamed), menus, and toolbars.

Options in the menu bar are frequently repeated in buttons contained in the toolbars. As you explore these menus, you will notice icons next to some of the options. These shortcut buttons on toolbars often become the easiest way to interact with QGIS. The following is a screenshot of the menu bar:

The Vector and Raster menus are worth exploring, and we will do this in Chapter 5, Spatial Analysis. You will often find that new plugins insert additional options within these menus or even create new menus. As we move through this book, we will often refer to the menu bar by just the name of the menu. For example, Database | DB Manager means click on Database menu and then the DB Manager option within that menu.

There are multiple toolbars to explore; let's take a look at some of the main ones. Toolbars are fully adjustable and dockable. The faint upright dots (in Windows) indicate the start of a toolbar and a faint vertical line indicates the end of a toolbar.

• Project: This toolbar contains the tools needed to create, open, save, and access the print layout (two buttons) and the style manger:

• Map Navigation: This toolbar contains the pan and zoom tools, as well as bookmarks (customized zoom) and map refresh:

• Attributes: These tools are used to identify, select, open attribute tables, and measure:

• Label: These tools are used to add, configure, and modify labels
• Plugins: This currently only contains the Python Console tool, but will be filled in by additional Python plugins
• Database: Currently, this toolbar only contains DB Manager
• Raster: This toolbar includes histogram stretch, and brightness and contrast control
• Vector: This currently only contains the Coordinate Capture tool, but it will be filled in by additional Python plugins
• Web: This is currently empty, but it will also be filled in by additional Python plugins
• Help: This toolbar points to the option for downloading the user manual

All these toolbars are shown in the following screenshot:

On the left screen border, we place the Manage Layers toolbar. This toolbar contains the tools for adding layers from the vector or raster files, databases, web services, and text files. It also contains the tools for creating new layers:

• Digitizing: The tools in this toolbar enable basic feature-creation and editing.
• Shape Digitizing: Useful for quickly building different shapes when editing.
• Advanced Digitizing: This toolbar contains the Undo/Redo option, advanced editing tools, the geometry-simplification tool, and so on. When activated, the right part of the screenshot is accessible:

• The data source manager toolbar contains buttons to quickly create new geopackage files and shapefiles, as well as calling the data source manager and creating temporary scratch layers:

Toolbars can be accessed by right-clicking on a menu or toolbar, which will open a context menu with all the available toolbars and panels. All the tools on the toolbars can also be accessed via the menu. If you deactivate the Manage Layers Toolbar, for example, you will still be able to add layers using the Layer menu.

As you might have guessed by now, QGIS is highly customizable. You can increase your productivity by assigning shortcuts to the tools you use regularly. You can do this by going to Settings | Configure Shortcuts. Similarly, if you realize that you never use a certain toolbar button or menu entry, you can hide it by going to Settings | Interface Customization:

The information bar is useful for finding out about the projection and navigation of the map. The information bar also contains icons about any log messages (potential errors) and any plugins with updates pending. It is shown in the following screenshot, and is located at the bottom of the QGIS window:

The search function is one of the new features in QGIS 3 and this helps to find processing tools or layers. You can use the shortcut keys shown in the following screenshot:

Alternatively, you can search directly for what you are looking for. For example, you can simply search for a buffer in the information bar search and the results will be similar to the following screenshot:

Browser and Layers panels describe where data is stored and how that data is displayed. Now is a great time to download some sample data. Head over to https://qgis.org/downloads/data/ and download training_manual_execise_data.zip. Extract it in a folder of your choice and then navigate to that folder in the Browser window.

I have located the basic_map.tif and forest_stands_2012.shp files and dragged them both into the Layers window. We will look at styling layers in Chapter 3, Visualizing Data, and then cover how to create a map in Chapter 4, Creating Great Maps.Lets take a look at Browser and Layers Panels in the following screenshot:

Now that we have added some data to the Layers window, the data will appear in the map. The following screenshot shows two layers that I have added to the map: one vector (forest_stands_2012) and one raster (basic_map):

The data has appeared! Notice that the projection in the information bar has changed; QGIS 3 supports on-the-fly projections. Finally, we have to save the project.The new default format is .qgz. Select Project | Save, and the window shown in the following screenshot will appear:

If you now click Project | New, you should see your saved project in the Browser window:

To load the project again, double-click on the project name.