Tabs and selections
There are three tabs at the top of the panel, denoted by symbols:
Tangents. Clicking on these tabs displays different groups of buttons, and highlights the relevant elements in the canvas. Path functions affect the path as a whole - it will maintain it’s proportions and essential shape. Point functions affect points and Tangent functions affect tangents.
You can select elements by dragging a marquee over them, or by clicking on them one-by-one while holding
Selecting elements in the canvas is not dependent on tab - you can still select points while you're in the tangents tab, and so on.
Unselected points and tangents are displayed with an outlined icon. When they are selected, it becomes filled. Selected paths are slightly brighter in the points and tangents tabs, and blue when in the paths tab.