In Normal mode, the context toolbar appears below the Toolbar and immediately above the document view. In Separated mode, the context toolbar floats and can be placed anywhere on your screen.
Each time you select a new tool, the context toolbar shows the commands and options relevant to the selected tool.
In some cases, the commands shown by the context toolbar change depending on selection type and the active Persona. For example, the Node Tool context toolbar will show different options for a shape than it will for a standard vector object made from curves.