Thread:Sannse/@comment-24824290-20140509144618/@comment-5454372-20140509150204

I use Photoshop myself, but Pixlr's editor is a very good online (and free) alternative. Get the image you want into the editor by either opening a URL or uploading it from your own computer, then click "Image --> Image size" and set the dimensions to the appropriate size (I don't know the exact optimum pixel dimensions for the Wikia slider, does anyone else know?). Save it to your computer and then upload!

Edit: posted that late, didn't realise you already knew about cropping ^^;