Would it be possible to configure pane widths

[mac95sb]

Pre-submit Checks

• I have searched Warp feature requests and there are no duplicates
• I have searched Warp docs and my feature is not there

Describe the solution you'd like?

It would be amazing if I could say I want the left pane to default to x width that would be super convenient

Is your feature request related to a problem? Please describe.

No response

Additional context

No response

Operating system (OS)

macOS

How important is this feature to you?

4

Warp Internal (ignore) - linear-label:39cc6478-1249-4ee7-950b-c428edfeecd1

No response

[oz-for-oss]

@mac95sb

Here's what I found while triaging this issue:

Warp currently supports manual pane resizing and can restore resized panes, and Tab Configs can define split layouts. The current documented/configured split-layout formats appear to size children equally and do not expose a width, ratio, or flex value.

I have a few follow-up questions before I can narrow this down:

1. Should this apply globally to every new split pane, or only to saved Tab Config / Launch Configuration layouts?
2. Would you prefer specifying the width as a percentage/ratio, a fixed pixel or column width, or either form?

Reply in-thread with those details and the triage workflow will automatically re-evaluate the issue and update the diagnosis, labels, and next steps.

Maintainer details

I concluded that feature request to configure default or saved-layout split pane widths instead of always starting configured splits at equal sizes..

Triage summary

This is an enhancement request for configurable initial/default split-pane sizing, specifically making a left pane open at a chosen width instead of requiring manual resizing after creation.

Current behavior from code/docs

• Split-pane state is represented internally as a pane tree with per-child flex values. Manual resizing updates those flex values, and restored app/session state can persist non-equal sizes.
• New split panes and pane layouts created from templates default to equal flex values.
• User-authored Tab Configs and legacy Launch Configurations currently expose split direction and child pane ordering, but not width, ratio, or flex fields. The public Tab Config docs explicitly state that split children are equally sized.

Likely implementation area

This likely needs product/API design for a sizing field on either global split-pane defaults, saved Tab Config / Launch Configuration layouts, or both, followed by plumbing that value into pane-template construction instead of always assigning equal flex.

Duplicate check

I searched all open issues and recent closed issues for pane/split width, size, ratio, default, and layout requests. Related issues include #11499, #8741, #8965, and #8930, but they cover adjacent surfaces rather than the same configurable default pane-width request, and fewer than two likely duplicates were found.

Question reasoning

1. Should this apply globally to every new split pane, or only to saved Tab Config / Launch Configuration layouts? — The code has separate paths for interactive split creation and saved layout/template creation, so the intended configuration surface materially changes the product and implementation scope.
2. Would you prefer specifying the width as a percentage/ratio, a fixed pixel or column width, or either form? — The internal pane model uses flex ratios, but the reporter asked for a pane width; the desired unit affects the schema and UX design.

This is my automated analysis and may be incorrect. A maintainer will verify the details.

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