part is injected, so the scripts live there; the slide app loads afterwards, as a deferred module. The first time presenter view opens in a browser, give the script more room: Slidev's second layout (script in a full-height left column), the column at ~55% of the screen, and text 1.4x larger. Runs once per browser and address; after that, whatever you set with the layout button, drag handle and A+/A- is kept. Also: browsers block the slide app's scripts on file:// pages, which would leave a blank screen; this says why and points to versions that do work. -->