Tender Library Layouts

Width: The panel is 854 px and the content 806 px — the same on every display. On the Deck that is the whole screen; on a desktop Big Picture window the library stays visible beside it. Nothing here needs to be responsive in width.
Height: The scarce axis. On the Deck the panel is 454 px and the page's body about 263 px after the title bar, Back, the page title and the tab row. A taller window simply gives the two regions more rows. Every layout below is drawn at the Deck's height — the worst case.
Navigation: Focus selects in a list, A works the control in the row, L1/R1 switch the tabs, and a row must be focusable to be reachable at all.

A · List and detail

The platform list on the left, everything about the focused platform stacked on the right. This is the layout the design record already describes.

‹ Tender

‹ BackLibrary

L1PlatformsCollectionsR1

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Synced 1

PlayStation3 / 5

Dreamcast0 / 2

Nintendo DS1 / 2

Sega Game Gear—

SNES—

Available

Game Boy—

PSP—

PlayStation132 on RomM · 128 in Steam

Emulator core 2

Beetle PSX HW

Default: Beetle PSX

›

BIOS files 33 / 5 required

Wanted	On disk	Contents
scph5500.bin Japan	✓	—
scph5501.bin USA	✓	—
scph5502.bin Europe	✓	—
scph1001.bin USA, alt	missing	—	Download
psxonpsp660.bin optional	missing	—	Download

Download required (2)

Download all

Delete BIOS (3)

Remove 4

Remove 128 shortcuts

Delete save files

List 264 px · detail 526 pxDetail scrolls: BIOS table and Remove are below the fold

Notes

1
Two groups, frozen order. Synced above Available, alphabetical inside. Toggling a row does not move it while the page is open. The row carries the BIOS state as a number — 3 / 5, 0 / 2, a dash where the platform wants none — so the colour only reinforces it. The toggle in the row is the only sync control: focus is already there and A works it, so the detail does not repeat it.
2
Core. One row that opens the same context menu the System page uses today. Needs the new per-platform read.
3
BIOS as a table. Wanted · On disk · Contents, Download on a missing row. Contents stays empty until #1803's backend half exists.
4
Remove last. The two actions from today's platform modal, red, confirmed.

What it costs

Only about four rows of the detail are visible at the Deck's height; core, BIOS and Remove are a scroll away.
Every fact about a platform is in one column, so nothing competes for width.
You see one platform's state at a time — comparing two means walking the list.

B · Detail with a header

Same two columns, but the detail's top is one compact header line instead of three stacked sections — so the BIOS table, the part with the most rows, starts near the top.

‹ Tender

‹ BackLibrary

L1PlatformsCollectionsR1

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Synced

PlayStation3 / 5

Dreamcast0 / 2

Nintendo DS1 / 2

Sega Game Gear—

SNES—

Available

Game Boy—

PSP—

PlayStation

132 on RomM · 128 in Steam · Beetle PSX HW 1

BIOS 3 / 5

Change core ›

BIOS files 3 / 5 required2

Wanted	On disk	Contents
scph5500.bin Japan	✓	—
scph5501.bin USA	✓	—
scph5502.bin Europe	✓	—
scph1001.bin USA, alt	missing	—	Download
psxonpsp660.bin optional	missing	—	Download

Download required (2)

Download all

Delete BIOS (3)

Remove 128 shortcuts

Delete save files

List 264 px · detail 526 pxThe whole BIOS table fits without scrolling; the two removals sit under it

Notes

1
One header line carries the name, the counts, the core and the BIOS state. Core and Remove become two buttons instead of two sections. The sync toggle stays in the list row, where the focus already is.
2
The BIOS table gets the space, which is the only part of a platform with a variable number of rows. Contents is #1803's column: whether the file on disk is the right one. Its backend half does not exist yet — the vendored resolver can verify, the plugin asks it not to — so every row reads a dash until that lands.
3
The two removals are named and sit last, under the BIOS buttons, red. Reaching them takes a scroll, which is right for what they do.

What it costs

Changing the core moves behind a press. The core is readable in the header but not changeable there.
Denser header — four facts on one line at 526 px.
A platform with no BIOS at all shows a nearly empty pane.

C · One wide table

No detail pane. Every platform is a row across the full width with its facts as columns, and A opens the focused row in place.

‹ Tender

‹ BackLibrary

L1PlatformsCollectionsR1

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Platform 1

RomM

Steam

Core

BIOS

Sync

PlayStation

132

128

Beetle PSX HW

3 / 5

2 Change coreDownload required (2)Download allDelete BIOSRemove shortcutsDelete saves

Wanted	On disk	Contents
scph5500.bin	✓	—
scph1001.bin	missing	—	Download

Dreamcast

Flycast

0 / 2

Nintendo DS

melonDS

1 / 2

SNES

301

Snes9x

—

Game Boy

210

not synced

—

One region, 806 px wideThe open row pushes the rest down

Notes

1
Everything at a glance. Core and BIOS state are columns, so you compare platforms without walking them one by one.
2
A opens the row in place — actions as a button row, then the BIOS files. Closing it restores the list.

What it costs

Height is the scarce axis and this spends it twice: the open row plus the rows below it. At 263 px you see the open platform and about two others.
The core label is needed for every visible row, not just the focused one — with a per-platform read that is one call per row.
Six columns at 806 px means a truncated core name on the longer ones.
It is the layout closest to today's System page, which the redesign set out to replace.

	A · list and detail	B · detail with a header	C · one wide table
Visible without scrolling (Deck)	7 platforms + core and the first BIOS rows	7 platforms + all five BIOS rows and their buttons	1 open platform + 2 rows
Compare platforms	one at a time	one at a time	all at once
Core reads needed	1 per focused platform	1 per focused platform	1 per visible row
Change the core	a row in the detail	a button in the header	inside the open row
Uses a taller display	more list and more detail	more list and more detail	more rows
Matches the design record	yes	yes, header instead of sections	no — it is the layout being replaced

Recommendation B. The two differ in one thing: what the top of the detail costs. A spends four rows on a name line and a core section, so the BIOS table starts below the fold; B spends one line on name, counts, core and BIOS state, and the table fits whole. Everything else — the list, the navigation, one core read per focused platform — is identical. A stays right if changing the core should be a visible row rather than a button.