There are several different types of menus available for changing different aspects of the music.
When an element is selected in a view, you can often right-click the mouse in the view to display commands that pertain to the selection.
Often, this popup menu contains items that are also found in the Properties Palette, but certain features are available only in the context menu.
When a note is selected in the Music Score, for example, the context menu contains items for changing stem direction, enharmonic equivalents, slurs, beams and so on. When the selected item is an accidental the context menu contains items to place the symbol above or in front of a note.
Try right-clicking in views, on windows and so forth to get an idea of what's available.