Others (John R for one) are more knowledgeable than me with toolbar stuff. But the attached image is what I could come up with. Maybe they will jog your memory as to how you did it before.
The top 'Line' one is just extra tabs added for the original line toolbar, and produces horizontal tools.
The 'Custom3' is a tabbed type toolbar, which opens vertical tools, but one doesn't have a single click option, without opening the vertical tools. done by creating new toolbar, and dragging Line> from the command page, clicking insert in the left pane.
The Flyout one 'Custom4', is done by moving tools from the drawing toolbar onto the custom one, however they are no longer on the drawing toolbar after doing this,
They are all produced by opening tools menu - customise (or tools menu - workspace - customise) and once that dialog is open things can be created and dragged around to ones liking. I could not find a way to produce a flyout toolbar without robbing tools from another toolbar.