Solutions

examst provides three levels of solution/answer-space functionality:

• solution — Invisible when hidden, shows framed solution when visible.
• answer — Fixed-height region: fill pattern when hidden, solution when visible.
• answer-space — Always-visible blank space (not tied to show/hide).

solution()

Renders nothing when show-answers is false. When true, renders the solution inside a styled frame.

Parameter	Type	Default	Description
title	content or none	global setting	Content prepended to the solution
emphasis	function or none	—	Function applied to solution body
frame	str, dict, function, or none	—	"boxed", "shaded", "none", or custom

#examst-set(show-answers: true)

#question(points: 5)[
  Why is the sky blue?
  #solution[
    Rayleigh scattering of sunlight by atmospheric molecules.
  ]
]

#examst-reset()

answer()

Renders a fixed-height answer region. Layout is stable between modes — the space on the page is consistent whether or not answers are shown.

Parameter	Type	Default	Description
height	length	global solution-height	Height of the answer region
fill	str or function	"lines"	Fill pattern: "lines", "grid", "none", or custom
frame	str, dict, or function	—	Framing style
title	content or none	—	Content prepended when shown
emphasis	function or none	—	Applied to solution body
sol-height	none, auto, or length	none	Height of solution frame when shown

Answer with Default Lines

#question(points: 10)[
  Explain the water cycle.
  #answer[
    Evaporation, condensation, precipitation, collection.
  ]
]

Answer with Grid Fill

#question(points: 10)[
  Draw a diagram of a cell.
  #answer(
    fill: fill-grid.with(spacing: 0.4in),
    frame: (stroke: 0.5pt),
    height: 2in,
  )[
    A labeled diagram of an animal cell.
  ]
]

answer-space()

Renders an always-visible answer space. Not tied to the show-answers toggle — renders unconditionally. Useful for scratch work areas.

Parameter	Type	Default	Description
height	length	global solution-height	Height of the space
fill	str or function	—	Fill pattern
frame	str, dict, or function	"none"	Framing style

#answer-space()

#answer-space(fill: fill-grid.with(spacing: 0.45in), height: 1in)

#answer-space(fill: "none", frame: "boxed")

Fill Pattern Helpers

These functions can be used directly or passed as the fill argument:

fill-lines

#fill-lines(height, spacing: 0.33in, stroke: 0.5pt)

Fills vertical space with ruled horizontal lines.

fill-grid

#fill-grid(height, spacing: 5mm, stroke: 0.5pt)

Fills vertical space with a grid of squares. Cell size is adjusted so columns divide the available width evenly.