Thunar seems to some people to be a very simple file manager, in fact I've seen this asserted quite a few times in various places such as reviews, blogs, vitriolic trolling complaints and so on. It's not actually true but it does look quite limited if you don't care to scratch the surface, read a doc or even just click around with your mouse and see what lurks in the menu. But in fact it's far more versatile than first appearances suggest because it supports custom actions (user created context menu entries) in a very neat way, making it possible to create even quite complex actions very easily and take advantage of the applications and utilities on your system, all from within the file manager. Post your favourites here!
A couple of simple ones:
Slideshow
This requires feh
This will take the images in the directories and/or files you select and display them in a fullscreen slideshow, 3 seconds per image. Use the keyboard h to pause the show and v to show the images actual (1:1) size.

Thunar is missing one facility found in most other file managers, the ability to highlight several directories and/or files and have the total size displayed. So I made a custom action:
How Big?

So I highlight some files and directories and use the 'How Big?' right click entry:

and get this:

I'll post a few more later, just wanted to get things started for now.
So please post your Thunar custom actions, simple or complex. Explain what they do, which applications they use, and if they call a custom script please post that as well. Ideally post screenshots as well but please keep the size reasonable and the text legible. I find scaling the dialogue boxes to 80% satisfies this, and posting a clickable thumb is better if you need to show a substantial part of the desktop.






