Some zooms have continuous macro focusing, which means you simply turn the focusing ring until it stops at the minimum focusing distance. You can still zoom in and out to control the subject by having the zoom control set at the longest focal length. Other zoom lenses have a special setting for macro focusing. This limited macro focusing is not quite as easy to use and is more restricted than continuous macro focusing, but it's adequate for taking occasional close-up photos. One-touch zoom control.
Most zoom lenses have one-touch zoom control.
A single ring on the lens barrel is turned to adjust focus and is pushed and pulled to control the zoom. If a zoom lens isn't a one-touch, it has two separate rings. One controls the focus while the other controls the zoom action. Some zoom lenses are described as having one maximum aperture, such as 75-205mm f3.8. The f-number remains constant throughout the zoom range.