Almost there...

src/CmpInput.svelte

@@ -36,7 +36,7 @@ function moveNoteSelection(ev: KeyboardEvent): void {
         // Create a new note
         dispatch("shift-enter")
       } else if (ev.altKey) {
-        // Create a new note
+        // Expand in-note results
         dispatch("alt-enter")
       } else {
         // Open in current pane

src/CmpModalInFile.svelte

@@ -1,11 +1,15 @@
 <script lang="ts">
 import CmpInput from "./CmpInput.svelte"
-import CmpInFileResult from "./CmpInfileResult.svelte"
+import CmpResultInFile from "./CmpResultInFile.svelte"
 import { excerptAfter, type SearchMatch } from "./globals"
 import { modal, plugin, resultNotes } from "./stores"
 import { loopIndex } from "./utils"
 import { tick } from "svelte"
 import { MarkdownView } from "obsidian"
+import CmpModalVault from "./CmpModalVault.svelte"
+import { OmnisearchModal } from "./modal"
+
+export let canGoBack = false
 
 let matches: SearchMatch[] = []
 let groupedOffsets: number[] = []
@@ -23,6 +27,15 @@ $: {
     // console.log(groupedOffsets)
   }
 }
+$: {
+  if (canGoBack) {
+    $modal.onClose = () => {
+      if (canGoBack) {
+        new OmnisearchModal($plugin).open()
+      }
+    }
+  }
+}
 
 /**
  * Group together close
@@ -95,7 +108,7 @@ function openSelection(): void {
   <div class="prompt-results">
     {#if groupedOffsets.length && note}
       {#each groupedOffsets as offset, i}
-        <CmpInFileResult
+        <CmpResultInFile
           {offset}
           {note}
           index={i}
@@ -117,6 +130,11 @@ function openSelection(): void {
     <span class="prompt-instruction-command">↵</span><span>to open</span>
   </div>
   <div class="prompt-instruction">
-    <span class="prompt-instruction-command">esc</span><span>to dismiss</span>
+    <span class="prompt-instruction-command">esc</span>
+    {#if canGoBack}
+      <span>to go back to Vault Search</span>
+    {:else}
+      <span>to dismiss</span>
+    {/if}
   </div>
 </div>

src/CmpModalVault.svelte

@@ -1,8 +1,10 @@
 <script lang="ts">
+import { TFile } from "obsidian"
 import { tick } from "svelte"
 import CmpInput from "./CmpInput.svelte"
-import CmpNoteResult from "./CmpNoteResult.svelte"
+import CmpResultNote from "./CmpResultNote.svelte"
 import type { ResultNote } from "./globals"
+import { OmnisearchModal } from "./modal"
 import { openNote } from "./notes"
 import { modal, plugin, resultNotes, searchQuery } from "./stores"
 import { loopIndex } from "./utils"
@@ -36,22 +38,32 @@ function onClick() {
   $modal.close()
 }
 
-function onInputEnter(event: CustomEvent<unknown>): void {
+function onInputEnter(): void {
   // console.log(event.detail)
   openNote(selectedNote)
   $modal.close()
 }
 
-function onInputCtrlEnter(event: CustomEvent<unknown>): void {
+function onInputCtrlEnter(): void {
   openNote(selectedNote, true)
   $modal.close()
 }
 
-function onInputShiftEnter(event: CustomEvent<unknown>): void {
+function onInputShiftEnter(): void {
   createOrOpenNote(selectedNote)
   $modal.close()
 }
 
+function onInputAltEnter(): void {
+  if (selectedNote) {
+    const file = $plugin.app.vault.getAbstractFileByPath(selectedNote.path)
+    if (file && file instanceof TFile) {
+      // $modal.close()
+      new OmnisearchModal($plugin, file, true).open()
+    }
+  }
+}
+
 function moveIndex(dir: 1 | -1): void {
   selectedIndex = loopIndex(selectedIndex + dir, $resultNotes.length)
   scrollIntoView()
@@ -74,6 +86,7 @@ function scrollIntoView(): void {
   on:enter={onInputEnter}
   on:shift-enter={onInputShiftEnter}
   on:ctrl-enter={onInputCtrlEnter}
+  on:alt-enter={onInputAltEnter}
   on:arrow-up={() => moveIndex(-1)}
   on:arrow-down={() => moveIndex(1)}
 />
@@ -81,7 +94,7 @@ function scrollIntoView(): void {
 <div class="modal-content">
   <div class="prompt-results">
     {#each $resultNotes as result, i}
-      <CmpNoteResult
+      <CmpResultNote
         selected={i === selectedIndex}
         note={result}
         on:hover={(e) => (selectedIndex = i)}
@@ -94,6 +107,11 @@ function scrollIntoView(): void {
   <div class="prompt-instruction">
     <span class="prompt-instruction-command">↑↓</span><span>to navigate</span>
   </div>
+  <div class="prompt-instruction">
+    <span class="prompt-instruction-command">alt ↵</span>
+    <span>to expand in-note results</span>
+  </div>
+  <br />
   <div class="prompt-instruction">
     <span class="prompt-instruction-command">↵</span><span>to open</span>
   </div>

src/CmpResultNote.svelte

@@ -34,7 +34,6 @@ function cleanContent(content: string): string {
   on:click={(e) => dispatch("click")}
 >
   <span class="omnisearch-result__title">
-    <!-- {@html note.basename.replace(reg, highlighter)} -->
     {@html note.basename}
   </span>
 

src/modal.ts

@@ -1,11 +1,11 @@
 import { Modal, TFile } from 'obsidian'
 import type OmnisearchPlugin from './main'
 import CmpModalVault from './CmpModalVault.svelte'
-import CmpModalFile from './CmpModalFile.svelte'
+import CmpModalInFile from './CmpModalInFile.svelte'
 import { inFileSearch, modal } from './stores'
 
 export class OmnisearchModal extends Modal {
-  constructor(plugin: OmnisearchPlugin, file?: TFile) {
+  constructor(plugin: OmnisearchPlugin, file?: TFile, canGoBack = false) {
     super(plugin.app)
 
     // Remove all the default modal's children (except the close button)
@@ -19,8 +19,11 @@ export class OmnisearchModal extends Modal {
     modal.set(this)
 
     if (file) {
-      new CmpModalFile({
+      new CmpModalInFile({
         target: this.modalEl,
+        props: {
+          canGoBack,
+        },
       })
     }
     else {