> For the complete documentation index, see [llms.txt](https://docs.wisej.com/theme-builder/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/theme-builder/user-interface/source-editor.md).

# Source Editor

The **Theme Builder** includes a code editor that you can use when you need to manipulate the theme source code directly. It's particularly useful when you have to copy & paste sections of the theme or you want to apply changes quickly.

![Source Editor](/files/drjIQ4mlQu8ang0bJNX8)

| Element                                                   | Description                                                                                                                                |
| --------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
| ![cut](/files/98xsLQTf3jQIkgE3DH5Q)                       | Deletes the selected text and copies it to the clipboard.                                                                                  |
| ![copy](/files/9EUXqpHNb6Q0cWD5uD4p)                      | Copies the selected text to the clipboard.                                                                                                 |
| ![paste](/files/TgXY6r4JP83Zi9n7SPfH)                     | Pastes the text in the clipboard at the current location.                                                                                  |
| ![collapse](/files/Tn2eGiO9kZ7iEat7cfUx)                  | Collapses the outline to the first level. It makes it easier to work with.                                                                 |
| ![expand](/files/8t0MuONv4nQAQMNc6x39)                    | Expands the collapsed outline.                                                                                                             |
| ![undo](/files/km2KrzmKKkRg9ChRl1n2)                      | Reverses the last operation.                                                                                                               |
| ![redo](/files/zbz2cKHp3SzuHUmEQ3XR)                      | Reapplies the previous operation that was reverted using **Undo**.                                                                         |
| ![search](/files/DBhCmk2bWtdrN2Fyo2bu)                    | Opens the Search window. Same as Ctrl-F.                                                                                                   |
| ![replace](/files/wCRC60qAc7gIDByc7wZr)                   | Opens the Search & Replace window.                                                                                                         |
| ![100percent](/files/dy6j2V2ciCmJF3L88Vd4)                | Changes the size of the font in the editor.                                                                                                |
| ![save Preview Script.Image](/files/wtZwL8BUkgrXiMvIhKgW) | Updates the theme tree and the preview panel. You still need to save the theme to the theme file using the save button in the top toolbar. |


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