Algebra View
Algebra View User Interface
By default, the Algebra View is opened next to the Graphics View. In addition, either the Input Bar is displayed at the bottom of the GeoGebra window (GeoGebra Desktop), or an Input Field is integrated directly in the Algebra View (GeoGebra Web and Tablet Apps). The Graphics View Toolbar is displayed at the top of the GeoGebra window, with the Undo / Redo buttons in the top right corner.
GeoGebra Web and Tablet Apps 
GeoGebra Desktop 
The Algebra View is part of the Algebra Perspective, although you may change the layout of GeoGebra’s user interface according to your needs.
Creating Mathematical Objects
Direct Input
In the Algebra View you can directly enter algebraic expressions using the integrated Input Field (GeoGebra Web and Tablet Apps) or the Input Bar at the bottom of the GeoGebra window (GeoGebra Desktop). After hitting the Enter key your algebraic input appears in the Algebra View while its graphical representation is automatically displayed in the Graphics View.
The input y = 2 x + 3
gives you the linear equation in the Algebra View and the corresponding line in the
Graphics View.
Commands
GeoGebra also offers a wide range of Commands that can be used to create objects in the Algebra View. Just start typing the name of a Command into the Input Bar or Input Field and GeoGebra will offer you a list of Commands that match your input.
Tools
Although the Algebra View doesn’t have it’s own Toolbar, you can create Dependent Objects. Select a tool from the Graphics View Toolbar and click on any appropriate object in the Algebra View in order to create a new Dependent Object.
Create two points A and B, whose coordinates are displayed in the Algebra View. Select the Line Tool from the Graphics View Toolbar and click on both points in the Algebra View in order to create a line through points A and B.
Modifying Mathematical Objects
You can modify the algebraic representation of mathematical objects directly in the Algebra View.
Activate the Move tool and doubleclick a Free Object in the Algebra View. In the appearing text box you can directly modify its algebraic representation. After hitting the Enter key, both the algebraic representation in the Algebra View and the graphical representation of the object in the Graphics View will automatically adapt to your changes.
If you doubleclick on a Dependent Object in the Algebra View, a dialog window appears allowing you to Redefine the object.
Display of Mathematical Objects
By default, mathematical objects are organized by Object Types in the Algebra View. In GeoGebra Desktop, you may use the Style Bar option Sort by in order to resort the objects by Dependency, Layer or Construction Order.
Hint: You can collapse or expand each group of objects individually (e.g. all points, all free objects, all objects on a specific layer) by clicking on the plus or minus symbol in front of the group’s name. 
Algebra View Style Bar
The Algebra View Style Bar provides buttons to

show / hide Auxiliary Objects

sort the list of objects by different criteria

display additional Views in the GeoGebra window (GeoGebra Web and Tablet Apps)
Hiding Mathematical Objects in the Algebra View
If you want to hide the algebraic representation of an object in the Algebra View, you may specify the object as an Auxiliary Object. Open the tab Basic of the Properties Dialog and check Auxiliary Object.
By default, Auxiliary Objects are not shown in the Algebra View. You can change this setting by selecting Auxiliary Objects from the Context Menu (rightclick or Mac OS Ctrlclick), or by selecting on the appropriate icon in the Algebra View Style Bar.