How to expand a file for editing

I am a newbie to Audacity and I noticed when I import a file (wav or mp3) it is compressed in the editing area compared to when I was recording it. Is there a key combination the will expand the complete file?

Many thanks


I think you may be looking for “zoom”
My preferred way of zooming in and out is “Ctrl + Mouse Wheel”

Thank you. I’ll check it out.