A poster and its social card. A logo and the three sizes it ships in. Front and back of a business card. Until now each of those was a separate SVG file, or one page with everything crammed onto it. SVG Editor for Mac now gives a document as many artboards as the job needs, laid out side by side on one canvas.
Pages, not containers
An artboard in SVG Editor is a page. It does not own the artwork drawn on it: objects keep living in your layers, exactly as before, and an artboard is simply a named rectangle that says where a page begins and ends. Drag a shape from one artboard to another and nothing changes in the Layers palette. This is the model you already know from other vector editors, and it keeps the SVG itself clean.
The Artboards palette
Window ▸ Artboards (⌥⌘L) lists every page with its name and size. Click a row to make that artboard current; the zoom stays where you left it. The buttons along the bottom add a new artboard next to the current one, duplicate it together with the artwork on it, delete it (a document always keeps at least one page) and reorder the list. Double-click a row, or an artboard label on the canvas, to open Artboard Options: name, width, height and position in one dialog.
The Artboard tool
The Artboard tool (⇧O) lives in the Hand tool's flyout. Drag on empty canvas to draw a new page, drag a label to move one, ⌥-drag to duplicate it, ⇧-click to select several and move or duplicate them together. Artboards never overlap, so a page you drop onto another one slides into place beside it.
Everything else follows the current page
Fit in Window, Document Setup, the rulers, the grid and the Navigator all act on the artboard you are working on. Export now offers Current artboard or All artboards, so a set of icon sizes or a multi-page leaflet comes out of one file in one go.
Still a plain SVG
The artboards are saved inside the SVG itself. Open the file in any other application and you see the pages laid out exactly as in the editor. Documents without artboards are untouched: there is nothing to convert.
Multiple artboards are in Vector Designer 26.1.1, the direct download for Mac. Tell us how you use them from the Feedback palette inside the app.