Image Menu

Properties...

Gives you the image properties.

Image Background Color and Transparency...

Change the background canvas color.

Convert Current Image Color Space...

Converts the current image to a new colorspace.

Trim to image size

Trims all layers to the image size. Useful for reducing filesize at the loss of information.

Trim to Current Layer

A lazy cropping function. Krita will use the size of the current layer to determine where to crop.

Trim to Selection

A lazy cropping function. Krita will crop the canvas to the selected area.

Rotate

Rotate the image.

Shear Image...

Shear the image.

Mirror Image Horizontally

Mirror the image on the horizontal axis.

Mirror Image Vertically

Mirror the image on the vertical axis.

Scale to New Size...

The resize function in any other program. Shortcut Ctrl + Alt + I

Offset Image...

Offset all layers.

Resize Canvas...

Change the canvas size. Don't confuse this with Scale to new size. Shortcut Ctrl + Alt + C

Image Split

Calls up the Image Split dialog.

Wavelet Decompose...

Does Wavelet Decompose on the current layer.

Separate Image...

Separates the image into channels.