Getting a screendump of the current view

It's a bit difficult I'm afraid. The problem is the display itself is write-only, so Bangle.js cannot read back what's on it - and there's only ~40kB RAM available so there can't be an offscreen buffer.

However there are some options:

• If your app will run in the emulator, use that - there's even a screenshot button. https://www.espruino.com/ide/emulator.html
  

• Define a new graphics object that's only 1bpp (black and white) which will fit in RAM, and then dump that...

  g = Graphics.createArrayBuffer(240,240,1);
  // draw...
  g.dump();  // this prints the bitmap to the console of the Web IDE, then you can just copy/paste or screen grab
  

Potentially you could render the 16bpp image in slices, but that's a lot of work!