Zoom button disappears with window reduced
Hello.
When my window is large enough I have a zoom buttonz that looks like a magnifying glass with a plus sign in it. When I click on it another mini menu pops down with a plus and minus on each end, and a numeric zoom-setting with a down arrow. When I reduce the Adobe window size the button disappears. How can I control the zoom level using the mouse in this case? I don't want to have to use the ctrl + or ctrl - button because I'm too lazy to move my hand to the keyboard from the mouse.
Thank you,
Steve