Browse a folder without touching the mouse

Lumeira is built for going through a lot of images quickly. That means the keyboard, and it means the app stays out of the way. Here is the set of keys worth knowing on day one.

Moving

• → and ←: next and previous image.
• ⌘↑ and ⌘↓: first and last image in the folder.
• ] and [: next and previous folder beside this one. The first time you use these, macOS asks you to allow access to the parent folder. That is a one-time question. See Folders and permissions.

Looking

• 0: actual size. Press again to fit the window.
• ⌘= and ⌘-: zoom in and out. Scroll wheel zooms around the cursor.
• ⇧F: fill the window, cropping the edges.
• M: magnifier loupe that follows the cursor.
• G: RGB histogram in the corner.
• I: info panel with camera, exposure, and dimensions.
• T: pin the thumbnail strip open. Without pinning, it slides in when you move the mouse to the edge.

Fixing orientation

• R and L: rotate clockwise and counter-clockwise.
• H and V: flip.

These do not write to the file. They apply to what you see and go away when you move on.

Deciding

• ⌘⌫: move the file to the Trash. You get asked once.
• ⇧⌘R: show it in Finder.
• ⇧⌘S: share.

The two people miss

K opens compare mode, which is the reason to use Lumeira instead of Preview. There is a whole guide for it.

? shows all of this inside the app, with your own keys if you have changed any in Settings.