Step 1: Load Liquids and Dry Ingredients in Order: Add the warm water and butter first, then the flour. Make a well in the flour and add the yeast, with salt and sugar in the corners away from it. Keep the yeast from touching the salt and water.
Step 2: Seat the Pan in the Machine: Install the pan and paddle. With a small dough, double-check the paddle is locked — at low volume a loose paddle is even more likely to drop out early in mixing.
Step 3: Express Cycle, 1.5 lb, Medium Crust: Choose the Quick / Express cycle and set the loaf weight to 1.5 lb (or "small"), with medium crust. The display should show about 1:30 (90 minutes).
Step 4: About 90 Minutes, Fully Automatic: The machine kneads, does a short proof, and bakes on its own. The smaller dough proofs faster, moving into the bake phase in about 35 minutes. Through the window you'll see it rise to fill the pan and turn golden on top.
Step 5: Unmold, Cool, and Slice: When the cycle ends, immediately lift the pan out and invert to release the loaf. Cool on a wire rack for at least 30 minutes. The small loaf sheds heat faster, but the interior is still liquid structure when hot and will collapse if sliced too early. Once cool, slice to show the soft crumb.