The Appearance Panel
The Appearance panel lets you manage object's Fill, Stroke and other effects. To open the panel, choose Window > Appearance from the main menu.
1 - Each line contains one effect such as Stroke or Shadow.
2 - Hide or show an effect. Uncheck an effect to remove it from the design but still have the possibility to easily re-apply it again.
4 - Add a stroke.
5 - Add a fill.
6 - Show a panel with effect's settings. Some of the settings, such as the color or stroke width, can be accessed from the Appearance panel directly.
7 - Restore the default object's appearance. As a rule, an object will look as it was originally creates using a drawing tool.
Changing the Order of Effects
Effects in the Appearance panel are ordered in the same way as they were applied to an object.
The arrangement or effects atop of each other defines how the object looks on the canvas. Two rectangles below have identical paths, stroke and color fill. The only difference is that the left one has the stroke below the fill. The rectangle on the right has the opposite order of effects. As you can see, when the stroke is behind the color fill, half of the stroke width is invisible making it look two times thinner.
To change the order of effects, drag one to a new position.
The possibility to place certain effect above or below others in the list depends on their type. These types are presented in the Appearance panel as sections separated with lines. Let's see how those types would be arranged if all possible effects were present in the panel at the same time.
The Text entry occupies the top of the list. Then Stroke and Fill would go. You can place Stroke and Fill entries in any order you like, but you cannot place any of them above Text. The rest entries as Shadow or Glow, appear in the bottom section. Again, you can re-arrange them within their own section. Placing them to another section is not possible.
The Style of an Object
Any object in your design has particular effects set up in a certain way. We call such combination of effects "style".
In order to apply exactly the same style to a second object, you can copy this style. To do this, select the first object and choose Edit > Copy Style from the main menu. Then select the second object and use the Edit > Paste Style command. These commands are also available in the context menu that can be opened by right-clicking on an object.