What the View Entire Video does is make sure that both the beginning and the end of the video in yourtimeline is visible. If need be the clips on in the timeline will be made "smaller" in order to make them all fit on screen. The video is zoomed out to fit on screen.
There is NO way of automatically going back (Zoom in) to the situation you were in when you pressed the button. The only thing you can do is go to the point where you were editing and use the CTRl-mouse wheel combination to enlarge (widen) the clips on the timeline (or make them smaller). (or used the - and + icons below left (Zoom in and out)

However you make it sound like something bad has happen ("View Entire Video" icon by mistake"), so maybe something totally different has happend?

Let us know if this helps.

Quote What the View Entire Video does is make sure that both the beginning and the end of the video in yourtimeline is visible. If need be the clips on in the timeline will be made "smaller" in order to make them all fit on screen. The video is zoomed out to fit on screen.
There is NO way of automatically going back (Zoom in) to the situation you were in when you pressed the button. The only thing you can do is go to the point where you were editing and use the CTRl-mouse wheel combination to enlarge (widen) the clips on the timeline (or make them smaller). (or used the - and + icons below left (Zoom in and out)

However you make it sound like something bad has happen ("View Entire Video" icon by mistake"), so maybe something totally different has happend?

Let us know if this helps.

Thank you for your prompt reply Warry

No nothing bad has happened - just thought I had done something wrong

Regards