My gf accidently spell her file-name wrong and wanted to change it. i have no clue how to edit the name now that the name show up next to file manager. Please help.
Select the file you want to rename in File Manager. Bring up the application menu by pressing the Menu key or tapping the downward-pointing triangle in the top left corner of the window (or pressing F4 if you've got an external keyboard). Then it's File | Rename …
Most commands within an application can be accessed using the application menu.
