Suggestion to do with resizing

I am new to all this.. I've already inserted a background and am working on sprites.

All of my sprites are 750 x 1050.. because I'm using them for actual printing on paper. When trying to resize them in your software it let's me do one at a time.. how about a feature to lock aspect ratio? Have this be able to turn on or off.

This way if I change 750 to 100 it would automatically change 1050 to 140 for me.

The way I had to do it currently is open GiMP and find out what 1050 would become.

Maybe I misunderstood what resize did.. it doesn't actually resize my image.. It just makes the window small, so only part of my image shows up.

To stop it 'just making the window small', you need to change the resize mode from 'align top left' to 'stretch'.

I'd like a maintain aspect ratio button too, but Scirra has a lot to do!

Thanks very much!