hi xbeatle (I almost posted that with the mistyped xbeastle :-))
the zoom is only for 'preview' - if you want to resize the image:
in the menu
, click Resize image or canvas
Resizing the canvas ("Expand canvas") would make a border around the current image, so you need to deselect that.
Hang on I'll make a screenshot - go with the options below.
"Preserve ratio" is important.
Then increase the pixel number as desired, or the percentage.
I'm not sure what the best "Smoothing filter" is here - you could experiment - but it is important to note that
, as soon as you resize a screenshot, you will lose a lot of the quality/crispness of the image.
Resized image @150% below (click to enlarge)How to save an enlarged image?
that's a lot better than I would have expected actually