Resizable diff/code preview panel for suggested changes

What variant of Codex are you using?

IDE Extension (VS Code)

What feature would you like to see?

I’d like the suggested code changes / inline diff preview panel in the VS Code Codex extension to be resizable or expandable.

Problem

When Codex proposes changes, the review area for the suggested diff is too small. In practice, it often shows only a few lines at a time, which makes reviewing edits slow and uncomfortable, especially for larger changes.

Why this matters

Reviewing proposed code is a core part of the workflow. A very small preview area makes it harder to:

• understand surrounding context
• compare nearby edits
• review multi-line changes efficiently
• decide whether to accept the suggestion confidently

Requested improvement

Please add one or more of the following:

• a draggable resize handle for the diff/code preview panel
• an expand/maximize action for the preview
• an option to open the suggested change in a larger dedicated review view
• a user preference to set a larger default preview height

Expected outcome

This would make review much easier and reduce friction when Codex suggests non-trivial edits in VS Code.

Additional information

This is mainly a usability issue, but it has a big impact on day-to-day use. The current small preview works for tiny edits, but becomes difficult to use when the suggested change spans multiple lines or requires reading surrounding context.

I’m using Codex inside VS Code, and this becomes especially noticeable during normal review flow when checking suggested edits before accepting them.