Press Drop target on the toolbar to change Caitoo main window into the little shaped window. This little window will be always on the top of all windows. You can use it for drag&drop of URL's. As Dock widget, it also shows progress of running transfers.
Three different icons show status of transfer. Open hand means that no transfer is currently in progress. Grabbing hand means that some transfer is running. And finally, finger pointing down means that we are offline. The same icons, only smaller are shown in the dock widget.
Please note, that the only way how the drop target can be moved around on the screen is by holding down the left mouse button while the Alt key is pressed.
Right mouse button click opens a popup menu, where you can set this window to be sticky or not, open preferences dialog or quit application.