Overview

• The icon bar is the tall-and-thin panel at the right edge of the screen.
• The icon bar is only visible when the UI is NOT in single-column mode (Window > Single-Column Mode).
• When a document is open, the icon bar has two icons up top that correspond to the visibility of the properties column and the layers/libraries column.
• The icon bar always has a bottom icon to return to standard Photoshop icon, even in No Doc State.
• The top icons should be active (blue) iff their corresponding panel is expanded. The bottom PS icon should always be enabled but inactive.
• The tooltips of the top two icons should indicate that the column will be expanded or collapsed according to its current state.

Basic operation

• Single-click the first top icon to hide or show the properties column.
• Single-click the second top icon to hide or show the layers/libraries column.
• Single-click the bottom icon to return to standard Photoshop.

Advanced operation

• Command-click (or alt-click on Windows) either button to toggle the visibility of both columns at once. This means if one column is open, the visible column should be swapped; if two columns are open, both should close; and if zero columns are open then both should open.

Notes

• The bottom icon should return to standard Photoshop even in a modal tool state (e.g., while editing text)
• In the past there have been bugs with using cmd-tab to switch away from or back to Design Space causing the command key to be "stuck" on or off, so this would be a good thing to test.