Improve vector single symbol lesson

layer_styling/Vector_single_symbol/01_introduction.md

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+In QGIS, vector layers are styled by default using a single symbol. That
+means that, unlike with categorized or graduated symbols, all features
+of the layer will draw in the map canvas using the same symbol. This
+lesson shows how to change a symbol. Besides, it also shows how to
+create composed symbols.
+
+---
+
+**Note**: For this lesson, we suggest you undock the **Lessons panel**.
+To do so, click the **undock** button in the top-right corner of the
+panel. Then you can move it around using click and drag over the title.
+
+---
+
+Click **Next step** when you are ready to start.

layer_styling/Vector_single_symbol/02_active_layer.md

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+The lesson's project has a layer called *Raleigh_Downtown*, which is
+styled using an opaque fill. But, it would be nice if we could see the
+basemap as well.
+
+![opace_fill.png](opace_fill.png)
+
+In the **Layers Panel**, click the *Raleigh_Downtown* layer's name to
+make it active.
+
+The layer's item should be highlighted.
+
+![active_layer.png](active_layer.png)
+
+Once you have finished, click **Next step**.

layer_styling/Vector_single_symbol/03_open_styling_panel.md

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+With the *Raleigh_Downtown* layer active, in the **Layers Panel**,
+click the **Open the Layer styling dock** button.
+
+![open_layer_styling_dock](open_layer_styling_dock.png)
+
+The **Layer Styling** panel should open on the right-side of QGIS window
+with the *Raleigh_Downtown* layer selected.
+
+![layer_styling_panel](layer_styling_panel.png)
+
+Once you have finished, click **Next step**.

layer_styling/Vector_single_symbol/04_change_simple_fill_settings.md

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+In the **Layer Styling** panel:
+
+  1. Under **Fill**, click **Simple Fill**;
+  2. Set **Fill style** to `No brush`;
+  3. Set **Outline** color to `Blue` (example: `#1f78b4`);
+  4. Set **Outline style** to `Dot Line`;
+  5. Set **Outline width** to `1.0` `Milimeter`;
+
+    ![set_style](set_style.png)
+
+If, at the bottom of the panel, the **Live update** option is enabled,
+the style changes will be visible on the map canvas automatically.
+Otherwise, click **Apply**.
+
+![live_update_option](live_update_option.png)
+
+Click **Next step** once you are done.

layer_styling/Vector_single_symbol/05_simple_fill_results.md

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+On the map canvas, you should confirm that all the features of the
+*Raleigh_Downtown* layer are represented with a simple fill style,
+with hollow polygons with a dashed blue outline.
+
+![hollow_fill_dashed.png](hollow_fill_dashed.png)
+
+But, if we zoom a bit more, sometimes it's hard to tell what's inside
+the polygons, and what's outside.
+
+![hollow_fill_dashed_zoom.png](hollow_fill_dashed_zoom.png)
+
+There are other style types for polygon layers, and we can combine them
+with the previous one. That's what we will do in the next steps.
+
+Once you are ready, click **Next step**.

layer_styling/Vector_single_symbol/06_add_line_pattern.md

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+- Back in the **Layer Styling** panel, click the **Add symbol layer**
+  button.
+
+    ![add_symbol_layer](add_symbol_layer.png)
+
+- On the same toolbar, click the **Move down** button to make the new
+  symbol layer go bellow the previous one.
+
+- Now, with the new **Simple fill** symbol layer selected, click the
+  **Symbol layer** type. Take some time to examine all the available
+  options for polygons. Then, choose the `line pattern fill`.
+
+    ![set_Symbol_layer_type](set_Symbol_layer_type.png)
+
+With the **Line pattern fill** selected:
+
+- set the **Rotation** to `45.0º`;
+- set **Distance** to `3` `Milimeter`.
+
+    ![set_line_pattern_fill](set_line_pattern_fill.png)
+
+Under the **Line pattern fill**, click **simple line**. Then:
+
+- set the **Color** to `Blue` (example: `#1f78b4`);
+- set **Pen Width** to `0.2` `milimeter`.
+
+    ![set_line_style](set_line_style.png)
+
+If, at the bottom of the panel, the **Live update** option is enabled,
+the style changes will be visible on the map canvas automatically.
+Otherwise, click **Apply**.
+
+![live_update_option](live_update_option.png)
+
+Click **Next step** once you are done.

layer_styling/Vector_single_symbol/06_final_results.md → layer_styling/Vector_single_symbol/07_final_results.md

@@ -1,4 +1,5 @@
-Now, in the Map Canvas, you can see the layers's features styled with both symbol types.
+Now, in the Map Canvas, you can see the layers's features styled with
+both symbol types.
 
 ![pattern_line_fill.png](pattern_line_fill.png)
 

layer_styling/Vector_single_symbol/__init__.py

@@ -10,20 +10,29 @@
 
 # Steps
 
-lesson.addStep("Introduction", "01_active_layer.md", function=lambda: setActiveLayer("Raleigh_Downtown"),
-               endcheck=lambda: layerActive("Raleigh_Downtown"), steptype=Step.MANUALSTEP)
+lesson.addStep("Introduction",
+               "01_introduction.md",
+               steptype=Step.MANUALSTEP)
 
-lesson.addMenuClickStep("Layer/Properties...", "02_open_properties.md")
+lesson.addStep("Set active layer", "02_active_layer.md",
+               function=lambda: setActiveLayer("Raleigh_Downtown"),
+               endcheck=lambda: layerActive("Raleigh_Downtown"),
+               steptype=Step.MANUALSTEP)
 
-lesson.addStep("Change layer's symbol", "03_change_simple_fill_settings.md", steptype=Step.MANUALSTEP)
+lesson.addStep("Open Styling panel", "03_open_styling_panel.md",
+               steptype=Step.MANUALSTEP)
 
-lesson.addStep("Confirm symbol's changes", "04_simple_fill_results.md", steptype=Step.MANUALSTEP)
+lesson.addStep("Change layer's symbol", "04_change_simple_fill_settings.md",
+               steptype=Step.MANUALSTEP)
 
-lesson.addMenuClickStep("Layer/Properties...", "02_open_properties.md")
+lesson.addStep("Confirm symbol's changes", "05_simple_fill_results.md",
+               steptype=Step.MANUALSTEP)
 
-lesson.addStep("Add Line pattern fill", "05_add_line_pattern.md", steptype=Step.MANUALSTEP)
+lesson.addStep("Add Line pattern fill", "06_add_line_pattern.md",
+               steptype=Step.MANUALSTEP)
 
-lesson.addStep("Confirm final result", "06_final_results.md", steptype=Step.MANUALSTEP)
+lesson.addStep("Confirm final result", "07_final_results.md",
+               steptype=Step.MANUALSTEP)
 
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