Tool panels
At the bottom and right side of the main window are two areas that contain various tool panels. To reveal all panels at once, click 
(Show Panels) in the Panel section of the View menu, and to reveal a certain panel, place the mouse pointer over the corresponding tab. To resize the bottom panel area, drag its top border. To resize the right panel area, drag its left border.
Revealing the Site Library panel
The bottom panel area contains two tool panels: the Tag Selector, which is initially visible, and the Timeline, which is initially hidden.
The right panel area contains three more tool panels: the Actions panel, and the Site Library panel, which are initially visible, and the Layers panel, which is initially hidden.
To hide a single tool panel, click the Auto Hide box (
) at the right end of the panel’s title bar. When all the panels in a panel area are hidden, the area collapses to only its border.
You can rearrange the visible panels in a panel area by dragging one panel and dropping it above or below another. (To drag a panel, click and drag its title bar.) However, you cannot move a panel from its home area to the other panel area.
You can “undock” a tool panel by dragging it completely away from its home area. An undocked panel “floats” on top of other windows. To dock it again, drag it back to its home area.
What the tool panels do
Tag Selector
The Tag Selector displays the HTML tags surrounding the insertion point. Clicking a tag in the Tag Selector selects the page element corresponding to it. (See “The Tag Selector“.)
Timeline
Use the Timeline panel to create a timeline—a kind of animation that uses layers and JavaScript to move page elements over time. (See “Creating timelines“.)
Actions
The Actions panel lists the Javascript actions that have been attached to the current element, and lets you attach new actions. (See “Working with actions and events“.)
Site Library
Use the Site Library panel to insert and manage various resources that are common to the entire site to which the current document belongs, or if no local site is open, to browse the local file system and open files. (See “Using the site library“.)
Layers
The Layers panel lists any layers that exist in the current document, and lets you manage them. (See “Using the Layers window“.)