Instruction: Answer the given question using the supporting document.

Input:
Question: What adjustment is ingredients if 2.5 lb loaf turns out with concave top?
Document: You pour the requisite amount of water in the machine, then add the dry ingredients (flour, sugar, salt, yeast), finish with butter if it is called for, press three buttons and "Start." It takes about 3.5 hours to produce your choice of a 1 lb, 2 lb, or 2.5 lb loaf.
I got a bread machine because I wanted a simple way to make my own bread. It takes about 10-15 minutes to assemble the ingredients, and then it does everything else in about 3.5 hours for a 2 lb loaf. For one loaf at a time this is VERY easy. If I needed to make multiple loaves at a time for a larger family I might just opt for using the Kitchen Aid mixer and convection oven for multiple bread pans all at once.
Nothing exotic, just a 1.5 lb. loaf of white bread. The tops of the loaves collapse. I've done everything the troubleshooting guide recommended for both "flat loaves" and "top and sides cave in". No luck.
This 1.5 lb loaf is barely contained in the baking pan - rises until it nearly touches the lid, then falls ever so slightly to a rather flat top. Beautiful crumb, slices very nicely. I am ready to declare success has been achieved on a great whole wheat loaf :-)
I usually make my own bread, but I wanted to try the convenience of a machine. The Hi Rise did well. In fact, it lived up to its name of Hi Rise. It was necessary to use less yeast (SAF) than usual to prevent the dough from touching the top of the lid even on the 11/2 lb loaf cycle.
I have been using this bread machine for a little over a year now, about 8 times total. Using the recipes in the manual for a 2.5 pound loaf work well. When I try to use a store-bought mix or even the recipes in the manual for smaller loaves, the bread machine turns the loaves  into small, hard, condensed loaves, more fitting for croutons than anything else.
However, once you know what it should look and feel like it is easy to do and stays in place unless I don't have it fully seated to start.Overall:For the money this is a good machine. It has a lot of options, is one of the few to make a 2.5 lb loaf.
This is the first bread machine that I have owned. I've had it for 4 days and have made 3 loaves of bread. All three of these loaves have come out great. This machine has the option of making a 1 lb, 1.5 lb, 2 or 2.5 lb loaf of bread. We have tried the 1 and 1.5 pound and both came out great.
It's taken some getting used to, but overall, a great bread maker. I like the sandwich recipe best. The crust does tend to come out a little thick so I use the lightest setting. 1.5 and 2 lb loaves seem the best size. 1lb is too small and 2.5lb push against the lid.Love the horizontal loaf and dual beaters.
This machine is my 3rd bread maker. This is the best one I've used! I don't like the &#34;tall loaf&#34; bread machines, this makes horizontal loaves from 1 lb up to 2.5 lb. I make all kinds of bread and it definitely lives up to it's name, Hi-Rise....I have had dough rise up to the lid lol  Great, great machine.
Answer: You added too much liquid. Next time reduce by  one or two tablespoons and you should be fine.