Dynamic buttons are a special type of button in Opus toolbars that behave
differently in and out of Customize mode. In Customize mode they appear like any
other button, and can be edited as normal - but in normal operation, the button
itself disappears and is replaced by a dynamic list of items. For example, the
Drive Buttons command on the supplied Drives toolbar is a normal button in
Customize mode:
But once the Customize dialog has been closed, we can see that the two
buttons have disappeared, to be replaced with one button for each of the drives
in the system:
When out of Customize mode the generated buttons behave like normal ones, but the advantage is that you only need a single button to generate them - instead of having to define a button for each drive.
Dynamic buttons are also used for things like displaying your Favorite folders, your FTP sites, and Lister layouts and styles.