How to change timeline size

[DanTeaDM 0]

Hi there Mine-Imator Community. As I stated in the title, how do you change the size of the timeline, like from 100 tick diference to 5 tick diference. I would like to know how to do this on a Macbook, and not a desktop as a Macbook laptop has no scroll wheel. Thanks for reading

PS. Does anyone know if I can use the render button to render the video, and not just the image. 

Edited September 4, 2016 by DanTeaDM

[Holy Knight 479]

I don't think there is a way to change the timeline size without a mouse wheel, also the render button for the video is literally right next to the render image button.

[Skjold 7.6k]

You can't without a scroll wheel. Pretty sure.