Using GIMP 2.8.22, Repositioned image disappears!

[zeuspaul]

You can see the extent of the canvas if you zoom to 100%. If you want a *white box* representing the size of the canvas then create a new layer. You want the *white box* as the background layer so you have to make it the lowest layer otherwise it will cover other layers. Or if the white box is a layer and it doesn't fill the canvas then you can scale the *white box* layer to the size of the canvas.