# Using the formula editor

So you want to use mathematical formulas and equations. Nice. How does the setup work?

### Configuration view

In a Worksheet or Quiz widget, add a question of the Equations type. Under General > Equation editor, you will find this table:

The colors of these buttons determine which options your students will see when they want to fill in a formula in the blank. You can click any of these buttons to change its color.

- means that the formula or symbol will be visible and useable by your students.
*not*be visible and useable by your students.
means that the formula or symbol will - means that the formula or symbol will be visible and useable by your students if it is either required for the answer, or if other symbols in the group are required for the answer.

Depending on the exact exercise, the availability and especially absence of certain symbols can act as too much of a giveaway as to which symbols your students ought to use. So on one hand, you might not want to restrict the options too much. On the other hand, you do not want to overload them either, whether it be with symbols they don't know (yet), or symbols they definitely won't need for your exercise. Striking a balance between the two will produce the most suitable outcome for both the exercise and your students' skill level.

### Preview / student view

In the preview, i.e. student view, the available symbol options will appear as a pop-up as soon as the cursor is placed within the text input field. When the amount of two symbols spans more than two lines, a scrollbar will appear.

The upper white-in-black arrows in the left side of the box allow you to select parts of the formula input in case selecting its elements with the mouse is difficult or impossible. The lower regular arrows move the cursor around within the formula you have typed.