Translations:Partitioning Overview and Existing Partition Tables/18/en
From Manjaro
It is worthwhile noting that the Manjaro installer will not overwrite a Home folder if it contains an existing username. As a consequence, the pre-installed desktop environment will lose its Manjaro configurations, and revert back to its basic ('vanilla') settings. In order to restore the Manjaro configuration settings, having booted into the freshly installed system, it will be necessary to enter the following command in your terminal: