The built-in filter is a useful feature when you want to download multiple documents at once. For example, you can save all documents of a specific tag or month locally as a zip file with just a few clicks.
1. Go to the document view
2. Click in the search box
3. Select the filter function
4. Enter a suitable filter (period, tag, company, document type, ...)
5. Select a document. A box will appear at the top left of the month
6. Also check the box of the month. This will mark all documents
7. Now you can download, forward, merge or delete all selected documents at once