VSCodeのエクスプローラーとタブが見づらいので、拡張1つと設定8行で整える This guide shows how to improve VSCode's hard-to-read file explorer and editor tabs using …

Visual Studio Code ships with a clean default layout, yet many developers find its file explorer and editor tabs hard to scan at a glance, particularly in large repositories with dozens of open files. A recent Qiita guide argues that this everyday friction can be resolved with a minimal footprint: a single extension plus roughly eight lines added to the user settings file. The appeal is speed and reversibility. There is little to learn, and nothing that permanently alters a project, which makes the approach easy to try and easy to undo.

The centerpiece of the recommendation is a file icon theme. Extensions such as Material Icon Theme or vscode-icons attach distinct, color-coded glyphs to files and folders based on their type, so a TypeScript file, a JSON config, and a Markdown document become instantly distinguishable without reading each filename. Because icons give the eye an anchor, scanning the explorer and the tab strip becomes noticeably faster. Icon themes are activated through the Command Palette using the "File Icon Theme" picker, or automatically after installation, and they can be switched or disabled at any time without side effects.

The settings portion targets the parts of the interface that the icon theme does not touch. These are edited in the user or workspace settings.json, which is reachable through the Command Palette command "Preferences: Open User Settings (JSON)." A typical set of adjustments increases the tree indentation with workbench.tree.indent so nested folders are easier to follow, enables workbench.tree.renderIndentGuides to draw guide lines, and turns off explorer.compactFolders so single-child folders are no longer collapsed onto one line. For tabs, workbench.editor.highlightModifiedTabs makes unsaved files stand out, workbench.editor.tabSizing controls how tabs shrink when space runs low, and a workbench.colorCustomizations block can add an accent border to the active tab so the current file is obvious. Together these amount to the "eight lines" the title promises.

It is worth understanding why the split between an extension and raw settings exists. VS Code separates its icon system, which is provided by themes, from its layout and color behavior, which are governed by settings keys. That is why no single extension covers every readability complaint, and why a small amount of JSON is usually needed to finish the job. Color customizations are especially flexible because they let users override individual interface tokens—such as tab.activeBorderTop or list.activeSelectionBackground—on top of whatever color theme is active, without forking or replacing the theme itself.

For readers who want to go further, the same mechanisms support broader tuning. Font choices through editor.fontFamily and editor.fontLigatures, breadcrumb navigation via breadcrumbs.enabled, and sticky scroll headers can all be adjusted in the same file. Users who prefer not to hand-edit JSON can make most of these changes through the graphical Settings UI, though the JSON view remains the clearest way to copy, share, or version a configuration. Storing settings in a workspace .vscode/settings.json also lets a team standardize appearance for a specific project, while Settings Sync can carry personal preferences across machines.

The wider context is a steady industry emphasis on editor ergonomics. Readability tweaks like these sit alongside a large ecosystem of appearance-focused extensions, popular color themes, and forks such as Cursor and VSCodium that build on the same underlying open-source Code base and inherit its settings model. Because the customization surface is shared, guidance written for stock VS Code generally transfers to those variants with little change. The trade-off to keep in mind is restraint: heavy indentation, aggressive color overrides, or too many icon variants can add visual noise rather than remove it, so the effect of each change is best judged individually.

The practical takeaway is that meaningful gains in daily comfort do not require a heavy setup. Installing one icon theme and pasting a short settings block addresses the most common complaints about the explorer and tab bar, and every step can be reverted by removing the extension or deleting the added keys. For developers who spend hours in the editor, that low-risk, high-visibility payoff is likely why such minimal configurations continue to circulate.