[Affinity Photo - how to crop centrally]

Hi all,

In other programs I am able to hold the cmd or alt key when dragging a side handle to adjust the size equally on both sides, but not so with Affinity Photo's Crop tool.

This is something I find I need to do regularly. Surely there must be a way to do this?

Please see attached screencast showing Affinity Designer resizing correctly as you would expect. this does not seem to be possible with AP Crop?

[IDML export]

Quite new to Affinity and have quickly come to the need for IDML export for sending to external art house.