# Create Own Theme Guideline

LibreOffice Theme Changer or LOTC (read: Lotis), is an extension to set the appearance of themes in LibreOffice. This extension was developed by the LibreOffice Indonesia Community. The LOTC source code can be seen in the [Github LibreOffice ID](https://github.com/libreofficeid/LO-TC-GUI) repository. Following are the steps to create a custom theme for LOTC. Before you start creating themes, make sure you have installed this extension in your LibreOffice. The installation guide can be seen in [at this link](https://docs.libreoffice.id/libreoffice-theme-changer/lotc/libreoffice-theme-changer-gui).