GIMP tools - BDA

GIMP 274
Dimensions and resolution
Canvas size
When you open any image or photo and apply ImageCanvas Size command, it opens
the Set Image Canvas Size dialog where you have to adjust the settings of three groups:
The Canvas Size group-box control controls the canvas size. The Width and
Height values are inter-connected, i.e. when one value is changed, the other
changes as well. Once they are disconnected, each value can be changed
irrespective of the other. The pixels button opens the list of measurement units.
When the values of Width and Height are increased, you can observe how the
image changes its position in the working window; it can best be seen in the
preview window:
Note!
The Offset group-box control allows you to set the location of the image in
respect of the working window. Use the X and Y values to set the position of the
image along the horizontal and vertical axis. The Center button lets you position
the image in the centre of the working window;