Following on from this topic:
Can you make the crop tool only crop the canvas by default?
… after resolving some initial confusion, the requirement from @Romio is to avoid new users being confounded and confused by krita Cropping to Image by default.

Romio believes that Applies to: Canvas is a more acceptable setting for most people who may not be familiar with krita.
Whatever is selected by the user in that Tool Options docker is stored in kritarc and therefore remembered for the next session. It is stored as the [KisToolCrop] block.
This is the content for a fresh installation of krita:
[KisToolCrop]
allowGrow=true
decoration=1
growCenter=false
The cropType value for Applied to: is not defined so it defaults to Image.
After Applied to: is set to Canvas, the stored content is:
[KisToolCrop]
allowGrow=true
cropType=1
decoration=1
growCenter=false
The Feature Request is that a freshly made kritarc file should have cropType=1 included in the [KisToolCrop] definition block.
After that, whatever the user selects will be stored for the next session.