Labels and Captions

Show and Hide Labels

You can show or hide the labels of objects in the Graphics View in different ways:

• Select the Show / Hide Label Tool and click on the object whose label you would like to show or hide.
• Open the Context Menu for the desired object and select Show Label.
• Open the Properties Dialog for the desired object and check or un-check the checkbox Show Label on tab Basic.

Name and Value

In GeoGebra, every object has a unique name that can be used to label the object in the Graphics View. In addition, an object can also be labeled using its value or its name and value. You can change this label setting in the Properties Dialog on tab Basic by selecting the corresponding option Name, Value, or Name & Value from the drop down menu next to the checkbox Show Label.

Note: The value of a point is his coordinates, while the value of a function is its equation.

Caption

However, sometimes you might want to give several objects the same label, for example, to label the four edges of a square a. In this case, GeoGebra offers captions for all objects in addition to the three labelling options mentioned above. You can set the caption of an object on tab Basic of the Properties Dialog by entering the desired caption into the text field called Caption. Afterwards, you can select the labelling option Caption from the drop down menu next to the checkbox Show Label. You can also use following placeholders in captions:

Placeholder	Meaning
%v	Value
%n	Name
%x	x coordinate
%y	y coordinate

Example: Let A be a point and (1,2) be its coordinates. Setting the caption to "Point %n has coordinates %v" results in caption "Point A has coordinates (1,2)"