There is no keyboard shortcut that will resize a selection. You need to be able to grab one of the control nubs with the mouse. If you can do that, the arrow keys will move the nub on a per-pixel basis for fine control.
The Zoom Tool is broken at the moment. Have you tried using Ctrl + mouse wheel to zoom in/out on your selection?
This is where we house the photo manipulation tutorials - see if there is anything there that can help http://forums.getpaint.net/index.php?/forum/22-image-and-photo-touch-ups/
It should do just that - maintain the canvas size. Is importing the new larger image changing the view size? Try pressing Ctrl + 0 to reset to 100% view size.
@anderpainter - you've been here long enough to know that replying to very old posts is forbidden. If you want to restart a topic just start a new thread.
CLOSED.
Hi Stuart and welcome
The online documentation is a great place to learn the basics. This page covers the eraser tool http://www.getpaint.net/doc/latest/EraserTool.html
There is an update in the pipeline which will fix the (currently broken) Zoom Tool.
Until then, use the Ctrl + Mouse Wheel to zoom.
To re-center an off center zoomed image, press Ctrl + B twice (Ctrl + B then Ctrl + B )
I've created a PayPal button for the post editor. Works much like the imgur button. It links to your PayPal account (the bit you need to specify) - you can't specify amount, description or currency (defaults to $US). At least you might get something!
Comments & discussion please.....