From GeoGebra Manual
Jump to: navigation, search

When designing applets it is important to allow (as much as possible) for all students to access them.

Fontsize, Color & Contrast

Using large fonts with a good contrast is important. Select a large font-size in Options -> Fontsize before you start designing your applet. You can also use the keyboard shortcut Ctrl + 2 to make all fonts bigger and all lines thicker. Ctrl + 3 will change the default for all new objects to be Black and unfilled.

Ideally use dark colors on a white background and thick lines. Pure Red and Green don't have a very good contrast so you should use some darker versions, eg Blue, Dark Green, Dark Red

If you use colors to distinguish otherwise-similar objects, then consider also using dashed lines for one of them. You can also find websites where you can check whether your color scheme is good, for example


Make sliders as long as possible so that they are usable by students whose fine motor-skills are less good. Consider adding "decrement" and "increment" Buttons at each end of the slider as well.

Keyboard Shortcuts

Students can use Tab to cycle round the objects in a worksheet you have designed. It is important that you uncheck "Selection Allowed" in Object Properties -> Advanced for the objects you don't want to be selected. There is a keyboard shortcut Ctrl + Shift + D in the desktop version that will toggle this property for objects other than Buttons / Sliders / Checkboxes / Points / Input Boxes.

The arrow keys Left, Right, Up, Down can be used to move Sliders and Points once they are selected.

Space can be used to activate a Button, toggle a Checkbox or start/stop a slider animating

Escape can be used to leave a worksheet and Enter to go back in (useful if you have several GeoGebra worksheets on one page)

GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.


You can provide custom tooltips for certain objects by using the Caption property, and changing how the tooltip is shown:

Screen Readers

You can have some text attached to the Graphics Views so that it is read by a screen reader.

If you make a text object in GeoGebra called altText, altText2, altText3D then it will be attached to Graphics View 1, Graphics View 2, Graphics View 3D respectively.

© 2018 International GeoGebra Institute