[Feature Proposal] Add option to move Wiki sidebar to the right side

Summary

Please add an option to move the Wiki sidebar back to the right side of the page, or allow users/projects to choose the sidebar position (left or right).

Description

Since a recent GitLab update, the Wiki sidebar now appears on the left side of the page. This layout change feels uncomfortable and visually unbalanced for many users who were accustomed to the sidebar on the right.

When reading or editing long pages, the new layout leaves a large empty area on the right, which makes the page feel incomplete or “cut off.” Several users have commented that the previous layout — with content centered and the navigation on the right — felt more natural and efficient.

Use case / Motivation

Many tools (e.g., Visual Studio Code with its minimap, IDEs, document viewers) place secondary navigation panels on the right, supporting the user’s natural reading flow.

The right-side layout makes better use of wide screens and keeps the main content visually centered.

Multiple colleagues and community users find the new left-only layout less comfortable and harder to navigate.

Proposal

Introduce a user or project-level setting that allows the Wiki sidebar to be placed on either:

Left (current default), or

Right (previous layout).

This could be implemented as a simple toggle in Wiki settings or personal preferences.

Benefits

Restores flexibility and familiarity for long-time users.

Improves readability and visual balance for large Wiki pages.

Increases user satisfaction with minimal UI changes.

Additional information

No reproducible bug — this is a feature request / UX improvement proposal. Current GitLab.com instance (as of October 2025) shows the sidebar fixed on the left without configuration options.