Currently, the option Show images turns completely OFF or ON pictures, with no respect to the used connection type. I think there is two problems with that:

• Show images OFF means that I cannot use Image captions/Image tags function, even on WiFi. Because they're functions for editors, which are need to selected manually by the user, I think they should work, not according to the setting.
• Personally, I'd like to see pictures when I'm on WiFi, but spare my mobile data when I don't need to see them. Currently, this cannot be done. I think a Show images only on WiFi would be a better and user-friendlier choice.

Environments observed

App version: 2.7.50340-beta
Android OS versions: 8.0.0
Device model: Samsung Galaxy S7 Edge
Device language: English