Values, coordinates and equations of free and dependant objects are shown in the algebra window (on the left hand side). Free objects do not depend on any other objects and can be changed directly.
You can create and modify objects using the input field at the bottom of the GeoGebra screen (see Direct Input; see Commands).
Note: Always press the Enter key after typing the definition of an object into the input line.
Related Topics
4. Algebraic Input
4.1.1. Change Values
4.1.2. Animation