Please add Preview On/Off styles~weights checkboxes

Feature request:

When I'm on the Specimen page for a font with many styles, e.g., https://fonts.google.com/specimen/IBM+Plex+Sans?preview.text=%22Oh;%20%C2%A1Dios%20m%C3%ADo!%20-10%C2%B0%20%E2%80%94%20See:%20a%205%C2%BA%20little%20Icicle%20up%E2%80%93%22
_(I left my "testing disambiguation 1Ilií¡0O°ºS5-–—" sample text in the link, since others may find it worth adopting)_, I would really appreciate it if there were an option to show the preview text only for the styles I'm interested in (e.g., just the 200, 400, & 600 weights, not the in-betweens nor extremes; or just the italics) so they could all fit "side-by-side" in one large-px screenful. It should be fairly simple to add checkboxes or ⌄ ⌃ (▼▲) to the site format, with all styles defaulting to Show|On, shouldn't it?