Learn to edit a formula
Start with the five practice exercises. They use a separate field and leave your playground formula unchanged. Each exercise checks the resulting formula model. You can reset an exercise, go back or close the practice area.
Make editing comfortable
If a fraction or nested formula feels small, choose Math size → 26px above the playground. This enlarges the formula while keeping the relative sizes of the base, exponent and radicand. A complex denominator makes the fraction taller; it does not automatically enlarge the numerator.
편집할 분수나 중첩 수식이 작게 느껴지면 위의 수식 크기 → 26px를 선택하세요. 수식 내부의 크기 비율은 유지됩니다. 분모가 복잡해져도 분자 글자가 자동으로 커지지는 않습니다. 편집 크기는 저장되는 LaTeX와 미리보기 이미지 크기를 바꾸지 않습니다.
Nested editing text has a 14px minimum. In a text-editor visual popup, use 125% or 150% zoom for a larger editing view. Editing size does not change saved LaTeX or the preview/export size. Embedded apps can configure a larger minimum and must allow the equation's line height to grow; see Styling.
1. Write, then correct
Type x+1. Click the number and change it to 2. Use Left/Right to move the caret. A held arrow key should keep moving. Undo and Redo let you inspect changes without starting again.
2. Build structure from existing input
Type a+b, then select it by dragging or using Shift+arrows. Press /. The selected expression becomes the numerator, and the denominator receives the caret. Type 2.
You do not have to choose a fraction before writing its contents. Selected math can also be wrapped with (, [, {, |, ^ and _.
3. Add a power or subscript
Select x, press ^, then type 2. Use _ instead when you need a subscript. Use Tab to move between editable slots. The editor preserves the distinction between a base and its scripts.
4. Change an existing structure
Click inside a square root. Press Alt+Down to open suggestions. Choose Change to Indexed root and press Enter. The new index is selected; type 3 to replace it. The radicand stays intact.
The same suggestion area offers supported bracket transformations when the caret is inside a bracketed expression. You do not need a toolbar. Escape closes the list; Undo reverses a conversion.
5. Bring in existing LaTeX
Put the caret after a formula. Press Alt+Shift+V, enter +c^2, then Ctrl/Cmd+Enter. This adds parsed LaTeX at the caret. Ordinary paste inserts text or preserved editor clipboard data; it does not automatically interpret LaTeX.
Read copy and paste before transferring formulas between applications. The site can also copy/download a PNG from its rendering preview. A PNG cannot be reopened as an editable formula.
Keep these controls nearby
- F1: keyboard and clipboard help inside the field.
- Alt+Down: suggestions and available transformations.
- Tab / Shift+Tab: move between slots.
- Ctrl/Cmd+Z: undo the last edit.
The keyboard reference explains selection, Enter and deletion rules. The LaTeX guide covers more notation. Developers embedding a field can continue with framework guides.