Handles PNG, JPEG, and BMP textures
Understands that multiple files may make up a texture (rgb / alpha / etc)
Shows multiple files as a single texture with x number of associated files
Alt+Left and Alt+Right switch quickly between the texture pane and the source pane
Spacebar selects the currently highlighted source
Displays a preview of the texture (RGB image if available, otherwise first found)
Texture can be scaled to preview window or manually between 10% and 1000%


The way I normally work is to start the app, maximize it and then set the preview window to 200%. I just find that 200% is a good scale to get a feel for what it's like in the game. The 'Fill' option is nice, but my monitor is 1900 x 1200 and when the application is maximized 'Fill' is just too much of a zoom for me...

Make sure you get used to using Alt+Left, Alt+Right and the spacebar. You can make it through a list fairly quickly without having to touch the mouse.