The second thing I did was to increase the size of my preview window. This is easy. The preview window is that gray box on the left of the window. This is the area that will give the user a preview of your filter's effect as he or she adjusts your sliders. Just select it and drag it by its bottom right corner, just as you would resize any window. Make it any size you want. From my perspective, the bigger the better. You need to keep something in mind, though. This preview window is a bit quirky. Just because you make it huge doesn't mean your preview is going to be huge. It all depends on the size and shape of the image you're using the filter on at the time. Now just position the preview window where you want it on your interface.

All changes made to your interface window in ResEdit will be applied to your final filter as well when you save.
You can stretch your preview window and rearrange your sliders and text just by dragging them around.

Now that you've changed the size and position of your preview window, you probably also want to change to position of your sliders and text. Again, just select them and drag them where you want them to be.

While we're on the topic, you've probably noticed one of the problems with Filter Factory, namely that the text next to your sliders gets cut off. To rectify this situation, just grab one of your text boxes there and stretch it out. (You can also just double-click on the text box and enter a numeric value for the width of the text box. (Use the number labeled "Right," as seen highlighted below, and enter in a larger value. This is actually the position of the right side of the text box, not its width, so the number will change if you reposition the text box later.)

Altering the size of your text boxes can be done either by simply stretching the
text boxes or entering numeric values for more precision.