Adding Hit Objects

Once you are satisfied with the BPM, click on the compose tab to start adding Hit Objects.

At this point, you start adding Hit Objects accordingly. The proper way to do that is beyond the scope of the MouseDance User Docs.

There are many Youtube tutorials regarding basic controls, techniques, and the thought processes behind how a beatmap should be designed.

Youtube channel pishifat is a good example. Also, here is the documentation on the Beatmap Editor.