postext.dev
Try the Postext typesetting engine live: edit markdown, manage figures and tables, tune Knuth-Plass justification, and export print-ready PDF and EPUB — in the browser.
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 8 · Act 48 · Transact 5 · Score: Not yet scored
Tool inspector
sandbox_render_page
A picture of a page of the book as it is laid out now — the way to see the effect of a change. It waits for the layout to follow the last change, so it can be called right after one. Without a page it gives the one on screen; count gives the pages after it too (2 for a spread). crop magnifies a part of the page for a close look at type and spacing. The picture shows what the settings draw on the page (baseline grid, crop marks), not the caret or the selection. The result is a list of content parts: a JSON text describing each page, then one image per page.
Page: /en/sandbox
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
chapter |
integer,string | no | The chapter: its position in the book (from 1), its title or its id. The chapter the reader is at when left out. |
page |
integer | no | The page number as printed on the page and shown in the viewer's page field. |
position |
integer | no | The page by its position among the chapter's pages (from 1). |
count |
integer | no | How many consecutive pages, from that one (default 1, at most 6). |
width |
integer | no | Width of each picture in pixels (default 900). A crop is given at this width too, so it shows more detail. |
format |
string | no | Default jpeg. |
quality |
number | no | JPEG or WebP quality (default 0.82). |
crop |
object | no | A part of the page, as fractions of its width and height from the top left corner: { x: 0, y: 0, width: 1, height: 0.5 } is the top half. |
trimmed |
boolean | no | Leave out the margin with the bleed and crop marks, when the layout has cut lines. |
printPreview |
boolean | no | Paint the soft proof of the print output profile, with the trim, bleed and safe-zone guides and the preflight marks. |
Raw JSON schema
{
"type": "object",
"properties": {
"chapter": {
"type": [
"integer",
"string"
],
"description": "The chapter: its position in the book (from 1), its title or its id. The chapter the reader is at when left out."
},
"page": {
"type": "integer",
"description": "The page number as printed on the page and shown in the viewer's page field."
},
"position": {
"type": "integer",
"minimum": 1,
"description": "The page by its position among the chapter's pages (from 1)."
},
"count": {
"type": "integer",
"minimum": 1,
"maximum": 6,
"description": "How many consecutive pages, from that one (default 1, at most 6)."
},
"width": {
"type": "integer",
"minimum": 160,
"maximum": 2400,
"description": "Width of each picture in pixels (default 900). A crop is given at this width too, so it shows more detail."
},
"format": {
"type": "string",
"enum": [
"jpeg",
"png",
"webp"
],
"description": "Default jpeg."
},
"quality": {
"type": "number",
"minimum": 0.3,
"maximum": 1,
"description": "JPEG or WebP quality (default 0.82)."
},
"crop": {
"type": "object",
"description": "A part of the page, as fractions of its width and height from the top left corner: { x: 0, y: 0, width: 1, height: 0.5 } is the top half.",
"properties": {
"x": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"y": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"width": {
"type": "number",
"minimum": 0.02,
"maximum": 1
},
"height": {
"type": "number",
"minimum": 0.02,
"maximum": 1
}
},
"required": [
"x",
"y",
"width",
"height"
],
"additionalProperties": false
},
"trimmed": {
"type": "boolean",
"description": "Leave out the margin with the bleed and crop marks, when the layout has cut lines."
},
"printPreview": {
"type": "boolean",
"description": "Paint the soft proof of the print output profile, with the trim, bleed and safe-zone guides and the preflight marks."
}
},
"additionalProperties": false
}
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