obsidian-excalidraw-plugin/ea-scripts/Custom Zoom.md

/* You can set a custom zoom level with this script. This allows you to set a zoom level below 10% or set the zoom level to a specific value. Note however, that Excalidraw has a bug under 10% zoom, and a phantom copy of your image may appear on screen. If this happens, increase the zoom and the phantom should disappear, if it doesn't then close and open the drawing.

const api = ea.getExcalidrawAPI();
const appState = api.getAppState();
const zoomStr = await utils.inputPrompt("Zoom [%]",null,`${appState.zoom.value*100}%`);
if(!zoomStr) return;
const zoomNum = parseFloat(zoomStr.match(/^\d*/)[0]);
if(isNaN(zoomNum)) {
  new Notice("You must provide a number");
  return;
}

ea.getExcalidrawAPI().updateScene({appState:{zoom:{value: zoomNum/100 }}});