TeXcore integrates with Obsidian's core page preview mechanics to display real-time, mathematical popups whenever you hover over an equation link like `[[#^eq-einstein]]` or highlight items in the [Autocomplete Suggestions Menu](search.md).
The preview lookup hooks into Obsidian's internal `page-preview` engine. TeXcore intercepts link hover events, references the identifier against the active document's equation cache, locates the line offset, and scrolls the popup container to display the equation in focus.
This feature relies on Obsidian's core architecture. Open **Settings** → **Core plugins** and toggle **Page preview** to **Enable**. If this core dependency is deactivated, TeXcore will log a console warning and hover previews will fallback to standard text previews without viewport scrolling.
| **No preview modal opens** | Page Preview core plugin is toggled off. | Toggle on Page Preview in Obsidian settings. |
| **Formula text displays raw LaTeX** | MathJax rendering is disabled for suggestions. | Toggle on [Render Math in Suggestions](configuration/settings.md#render-math-in-suggestions). |
| **Preview focuses the wrong line** | Malformed `% id: eq-name` or stale index cache. | Touch-edit the note content to trigger a cache re-index. |