Task Bar

What you see at the bottom of the main application's window, is a Task Bar. It's functionality is similar to the Windows' task bar, that is, the buttons existing there represent the currently opened browse windows. You can:

Left click a button to activate a window
Right click a button to bring context menu
Drop files and directories into a button to perform a file operation (Copy, move, create links, compress - depends on the modifier keys pressed, more).

But, except those buttons, there is another, much smaller button, on the left of the Task Bar. This is what I named Auto favorites. At the beginning of the ACB's session, clicking this button brings nothing, but after a few file operations (copying, moving, deleting etc.) you'll find there those directories on which you performed those operations. In this way, you can find there directories on which you are currently working now, and it doesn't matter if those directories are currently open or not. But that's not all.

You can drag&drop a file or a directory to this button. And the location will be remembered, for current session only, which makes this button different than typical favorites which you can find on a menu. What does it give you? Typical favorites are great for locations you use all the time, in (almost) every session. But, usually, in the certain moment, you are working with specific folders, and it is sometimes not necessarily worth to add them to the typical favorites, so here it is: drag&drop the location to this button, will be remembered only in the current session.

Tip: to remember the currently opened location, you can drag&drop the icon being on the Title Bar to this button:

The vertical title bar icon (marked on the picture) has a special meaning: is is the current directory. You can bring a context menu (right mouse click), or drag&drop. In both cases the operation will be performed on current folder.