Use Select menu commands
Use commands on the Select menu to select objects in your document window.
To select all unlocked objects
On the Select menu, click All (or press CTRL+A).
Note that guides, locked objects, and objects on locked layers are not selected.
To deselect all selected objects
On the Select menu, click Deselect (or press CTRL+SHIFT+A).
If you want to deselect all the selected objects and select all the previously unselected items, use the Invert command. For example, if you have only the objects on the right side of your page selected when you select this command, those objects will become deselected and all the objects on the left side of the page will become selected. Of course, locked objects remain unselected.
To invert your current selection
On the Select menu, click Invert.
If you have an object selected, you can select all similar objects (with the same stroke name, stroke color, fill, or font) using the Select By command.
To select objects with specific attributes
On the Select menu, click Select By.
Click one or more attributes for your selection criteria.
For more information about how to use this command, see Select objects using shared attributes.
If you select the clone of any path, you can select the original path (the master path) by using the Select Master command.
To select the master path
On the Select menu, click Select Master.
To select a slice and the contents of the slice
Under Slice Layer in the Layers panel, make sure that the slice is visible and unlocked . Otherwise, you will not be able to select it. If a slice is hidden, click the Toggle Visibility button. If the slice is locked, click the Toggle Lock button.
Select a slice on the artboard or under Slice Layer in the Layers panel.
On the Select menu, click Select Slice Contents.