> For the complete documentation index, see [llms.txt](https://beyondcompare.gitbook.io/project/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://beyondcompare.gitbook.io/project/other/peek.md).

# Peek

### Folder Sync

Folder Sync can terrify you by showing a blank screen:

![](/files/-LaRexqsv4facMzBP9BP)

BC thinks you don't want to see the files that don't need syncing (e.g. files that are already up to date on both sides), so it hides them.  To unhide those files, press ![](https://firebasestorage.googleapis.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LXUX-uoaZJ8T4qyEc-x%2Fuploads%2FmtEYl8XiiToQyCquTJ9Z%2Ffile.png?alt=media) Peek 

![](/files/-LaRfC-34zj_f9_U90Ld)

### Turn off a filter

Other than Folder Sync, you don't have to worry about Peek in the beginning until you start using filters.  

Peek allows you to turn off a filter. Down below, I have those sort of (okay, extremely) annoying[ Apple meta files](https://apple.stackexchange.com/questions/14980/why-are-dot-underscore-files-created-and-how-can-i-avoid-them#14981) that get split off when you copy from Mac to a non-Apple environment.  

![Dot files, shown in a Folder Compare session](/files/-LaR_Q_SKOeaFprxJ8sB)

If you don't want to see files that begin with dot (1) you can set a filter with Session->SessionSettings->NameFilters.  Set the filter to Exclude files matching the pattern of "dot anything", in other words .\*.  Star means wildcard here, similar to DOS/JS language.  But now you can use  use ![](https://firebasestorage.googleapis.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LXUX-uoaZJ8T4qyEc-x%2Fuploads%2FGGFprvb87v0GTmO3mlOL%2Ffile.png?alt=media) Peek to toggle the filter on and off.