Still work to come on images, but recent updates include full screen images, released in October. From announcement:
Oh look, pretty pictures
If you refresh your Tana, you will now have access to Fullscreen images!
With fullscreen images, you can Open images in full screen with a button, or by pressing 'space' when the image is selected. Use arrow keys to navigate between sibling image nodes
🆇 Press space to close (and also x-button and esc as usual)
Still work to come on images, but recent updates include full screen images, released in October. From announcement:
If you refresh your Tana, you will now have access to Fullscreen images!
With fullscreen images, you can
Open images in full screen with a button, or by pressing 'space' when the image is selected. 
Use arrow keys to navigate between sibling image nodes
🆇 Press space to close (and also x-button and esc as usual)
Here's related release: https://tana.inc/releases/2024-wk39-41