# GeoGebra

## Manual:Algebra View

This view is part of GeoGebra user interface.

#### Dialogs

Using the Input Bar you can directly enter algebraic expressions in GeoGebra. After hitting the Enter key your algebraic input appears in the Algebra View while its graphical representation is automatically displayed in the Graphics View.

Example: The input f(x) = x^2 gives you the function f in the Algebra View and its function graph in the Graphics View.

In the Algebra View, mathematical objects are organized as free and dependent objects. If you create a new object without using any other existing objects, it is classified as a free object. If your newly created object was created by using other existing objects, it is classified as a dependent object.

Hint: If you want to hide the algebraic representation of an object in the Algebra View, you may specify the object as an auxiliary object:
Right click (Mac OS: Ctrl-click) on the corresponding object in the Algebra View and select Properties from the appearing Context Menu.
On tab Basic of the Properties Dialog you may specify the object as an Auxiliary Object.
By default, auxiliary objects are not shown in the Algebra View, but you can change this setting by selecting "Auxiliary Objects" from the context menu (right-click) or by clicking on the appropriate icon in the Style Bar

Note that you are able to modify objects in the Algebra View as well: Make sure that you activate the Move Tool before you double click on a free object in the Algebra View. In the appearing text box you can directly edit the algebraic representation of the object. After hitting the Enter key, the graphical representation of the object will automatically adapt to your changes.

If you double-click on a dependent object in the Algebra View, a dialog window appears allowing you to Redefine the object.

GeoGebra also offers a wide range of commands that can be entered into the Input Bar. You can open the list of commands in the right corner of the Input Bar by clicking on the button Command. After selecting a command from this list (or typing its name directly into the Input Bar) you can press the F1 key to get information about the syntax and arguments required to apply the corresponding command.

## Style Bar

This Style Bar contains two buttons.

Auxiliary objects
toggling this button shows or hides Auxiliary Objects.
Sort Objects by Type
when turned on, objects are sorted by type (e.g. Points, Lines, ...), otherwise they are divided among Free, Dependent and Auxiliary Objects (sorted by Layers or listed in Construction Order).