Page size

Page size controls the base width and height of pages in a page canvas. Change it when the shape of the work matters: a presentation page, printed handout, PDF page, report section, workshop template, or a page that needs a specific amount of room.

Page size is a page-canvas feature. A page canvas has bounded pages, page order, links, presentation flow, and page-based export. A freeform whiteboard is one open surface that grows as content spreads, so normal page size controls do not apply there.

When to change page size

A page canvas can mix sizes — a standard agenda page, a wide comparison page, a tall notes page, a compact decision page. Mixed sizes work when each shape has a job and become confusing when they are accidental, so scan the slide rail before sharing and rename or resize anything that looks off. Copied pages keep their size when possible; recheck placement after pasting between pages of different sizes.

Before you resize

Resizing changes shared canvas structure, so it requires edit access.

All-page resize is usually best early, before people align objects. If the canvas is already in use, tell collaborators what will change and why.

Change page size

• Resize this page is the safest action because it changes only the open page. Open the Page menu and choose it for a wide comparison page, a tall documentation page, or a compact decision page.
• Resize n pages changes a selected group to one shared size — useful for a section of design options, workshop activities, or imported pages that should match. Scan the section afterward so pages that were not meant to change did not.
• Resize all canvas pages lives in the canvas header menu because it changes the whole canvas. ALLO warns before applying it when existing pages would change; take that confirmation seriously, because it affects layout, previews, printed margins, and presentation framing.

Choose a useful size

The resize dialog includes common paper and screen presets (A3, A4, B4, B5, US Letter, US Legal, on-screen 16:9, on-screen 4:3); preset order can vary by region. Presets are shortcuts, not locks — you can still adjust width and height before applying, and the swap control flips orientation without retyping.

You can also enter a custom size. The valid range is 500–55,000 px for both width and height; if either value is outside that range, the resize action stays unavailable until both are valid.

Page size is intentional structure; automatic height adjustment is runtime protection. In a normal page canvas the saved size is the floor: width stays fixed, and height grows automatically when objects extend below the page, then returns to the base height when the room is no longer needed. So a page can look taller on screen than the dialog shows. If a page has auto-height disabled, the dialog can offer Enable automatic height adjustment — turn it on when content should extend the page downward instead of being cut off. Resizing changes the saved base dimensions; auto-height only protects content that extends below it.

How resizing affects content and export

Page size drives page-based output. PDF export and print depend on page order, page size, folded-page state, selected page range, loaded media, background contrast, and quality. Before output, check page order, titles, sizes, folded pages, and whether images or file previews finished loading; fold or exclude a page to keep it out, or unfold it to include it. See Export a canvas to PDF for PDF-specific quality and range behavior.

Presentation follows the page flow, and very wide or very tall pages can be hard to present because the audience sees extra scaling, empty space, or scrolling. Use screen-shaped presets for slide-style pages meant to be shown live. Mixed sizes produce mixed page shapes and margins in output, which is fine when it is deliberate.

Troubleshooting

• Resize controls are missing. Check the format first (freeform whiteboards have none), then permission (view, comment, guest, and read-only cannot resize), then layout (mobile or narrow views reduce the controls). Resize this page and Resize n pages are page-menu actions; Resize all canvas pages is in the canvas header menu.
• Objects still extend beyond the page. Confirm automatic height adjustment is enabled; width is fixed, height is the axis that grows.
• A page looks different in export or print. Check mixed page sizes, folded pages, browser scale, background contrast, and whether media finished loading.
• A page is too wide or tall to present. Resize it to a screen-shaped preset or split the content across pages.
• A custom size will not apply. Confirm both width and height are inside 500–55,000 px.
• The page is still crowded after resizing. It may need structure, not pixels — add pages, fold archive material, or move deeper work into a sub-canvas instead of treating height as infinite storage.