TEXT-088 px
Synthetic UI label at exactly eight pixels.
SYNTHETIC RESEARCH FIXTURE
v1.0.1
Original screenshot study / local-only instrument
Lantern Desk / measurement surfaces
Fake product content. No customer data. No network requests.
Selected section: Text scale
01 / SMALL UI TEXT
Known-size text samples
Five fixed CSS font sizes with visible measurement rules.
TEXT-1010 px
Synthetic UI label at exactly ten pixels.
TEXT-1212 px
Synthetic UI label at exactly twelve pixels.
TEXT-1414 px
Synthetic UI label at exactly fourteen pixels.
TEXT-1616 px
Synthetic UI label at exactly sixteen pixels.
02 / LONG SCROLL
Rows, rulers, and a sticky header
Scroll the bounded frame; the header stays attached to the frame top.
48 numbered rows / repeated ruler every 8 rowsframe 960 × 560 px
ROWFAKE WORK ITEMSTATEMARK
03 / NESTED SCROLL
Outer feed with an inner ledger
Use the two native scroll surfaces independently.
AOuter scroll surface
Three checkpoints sit above and below the inner region.
Three checkpoints sit above and below the inner region.
BScroll boundary
This copy is intentionally longer than one viewport.
This copy is intentionally longer than one viewport.
INNER LEDGER24 rows / own scrollbar
COuter continuation
Keep scrolling the outer frame after leaving the ledger.
Keep scrolling the outer frame after leaving the ledger.
DBottom checkpoint
End of bounded nested-scroll fixture.
End of bounded nested-scroll fixture.
04 / HORIZONTAL OVERFLOW
Wide synthetic planning board
Scroll left, middle, and right inside the frame without widening the page.
12 columns / canvas width 1,440 pxviewport 960 × 280 px
05 / CONTROLLED LAZY LOAD
Observer enabled by an explicit button
No observer exists until the control below is activated.
06 / TRANSIENT STATES
Tooltip and menu, button controlled
Use click, Enter, Space, Arrow keys, and Escape to set the transient states.
TOOLTIP / CLOSED BY DEFAULT
Focus or activate the native button.
Synthetic hintTransient content for screenshot state capture.
Escape closes
MENU / CLOSED BY DEFAULT
Arrow Down opens · Arrow keys move · Escape closes
07 / CONTRAST + ANNOTATIONS
Light/dark surfaces and primary marks
Toggle the board mode; red, yellow, and blue annotation samples stay visible.
Quiet text on a pale surface with a clear border.
Quiet text on a dark surface with a clear border.
RED / attention marker
YELLOW / caution marker
BLUE / reference marker