Online Whiteboard

A board for writing on a classroom TV, taking notes on a tablet with a pen, or sketching with a finger on a phone. It has several pages, can put a PDF or photo underneath to write on, and saves PNG or PDF files.

How to use

1. Choose "Pen (P)", "Highlighter (H)", "Eraser (E)", a shape or "Text box (T)", then a color and thickness. On a phone, swipe the toolbar sideways for more tools.
2. Write with one finger or a pen. Two fingers placed together zoom and pan.
3. Under "Background, import, save, settings", choose the "Page orientation", "Board color" and "Background pattern", or "Use an image or PDF as background".
4. "Add page" makes a new page; the ‹ › buttons under the board turn pages. Finish with "Save page as PNG" or "Save all as PDF".

How it works

• Writing is kept as line data, so it stays sharp when zoomed, and is saved in this browser after every change; the time of the last save appears under the board.
• While one finger writes, other fingers or a palm on the screen are ignored. Two fingers zoom only when they touch at almost the same moment.
• The board is for one device; several people cannot write on it at once.

Questions and answers

Why does my writing disappear?

A line you are writing is kept even if another finger touches the screen. If writing seems gone, the page was zoomed or moved; press "Fit page" to see it again. It is saved automatically.

How do I get the page back on the screen?

Press "Fit page" or the zoom percentage in the corner of the board, or tap twice with two fingers. At least a third of the page always stays on the board.

Can I write on a PDF or a photo?

Yes. "Use an image or PDF as background" puts the image, or one PDF page, under the current page. Files never leave this device.

My palm draws lines.

Touches are ignored while a pen writes. You can also turn on "Pen only", so that one finger pans instead of drawing.

Can I undo?

Ctrl+Z undoes and Ctrl+Y redoes, also after "Clear page". F switches to full screen.