How to sort by most recent

I recently purchased a wd live and got my unit to map all my shared folders on my synology.

In my “Movies” folder,  I can’t get my WD to sort by “most recent” or last modified.  I only have the A-Z option.

How do I sort by “recently added or last modified”  

I have tried adding my share to the Videos section and pressing the green button but no option to sort appears ?

Thanks for any suggestions.

The information about sorting and the different options can be seen on the manual.

Check Page 57 for more information.