M0r1d1n

It would be best if the dialogue box remember the last setting (as well as the padlock setting too).

99% of the time, when I use the Resize Canvas feature, I use the centre point, to expand outwards from the centre. Please either set this is as the default or add a feature where Affinity Photo / Designer remember the last used setting. I use keyboard shortcuts for close to everything and having to lift my fingers and use the trackpad is a waste of time.