Shortcut(s) for minimum zoom, zoom to percentage of canvas size

Start by locating the existing media-viewer commands for maximum zoom, 100% versus maximum zoom, canvas fit, and percentage zoom, then inspect how their shortcuts and user-configured zoom values are represented. Compare those entry points with the requested minimum-zoom and canvas-size-percentage variants. Done means the requested commands are available, including forced-centering variants, with behavior matching the existing counterparts.

I would like the following shortcuts for media viewers:

1. Minimum zooms (counterparts to max zoom shortcuts that already exist)
   1. zoom: min: set the zoom percent to the minimum the user has set in their options (counterpart to zoom: max.)
   2. zoom: min with forced media viewer center: the above, but with a forced re-centering of the media, obviously.
   3. zoom: switch between 100% and min zoom: counterpart to switch between 100% and max zoom
   4. zoom: switch between canvas fit and min zoom: counterpart to switch between canvas fit and max zoom
2. Percentage of canvas size zooms (supplements to set to percentage and canvas fit options)

   1. zoom: set to percentage of canvas size: set the zoom of the media to a value that is a percent of the media viewer canvas size.

      For example, if the canvas size is 2160x1440, then setting it to 50% of canvas size would be like zoom:canvas fit but as if the canvas was 1080x720. If the user inputs 100% for this, it will be the same as if they used zoom:canvas fit.

   2. zoom: set to percentage of canvas size with forced media viewer center: the above, but with a forced re-centering of the media, obviously.

My use case is that it would be faster than repeatedly pressing zoom shortcuts (or scrolling using a wheel/trackpad) while filtering duplicates where the media is quite large and part of it gets obscured by the duplicate filtering UI. In those cases, I have to scroll out to see the media, and this creates imprecision and is (even if only by a split second) slower than just setting to a particular zoom. However, the shortcut for setting it to a particular percentage is not useful for me, because images can be all sorts of sizes relative to the canvas size, so any value I choose is going to be too small for some images and too big for others.

Minimum zoom would be useful for a "set it and forget it" choice while percentage of canvas size would be useful for fine-tuning.

These obviously don't need to have a default binding, and it's ok if the % of canvas size options have to pick the nearest available configured zoom size for media that the user has in their options. I just want these shortcuts available to me.