AffinityUser99

Thanks Arba, that fixes it. Didn't realise it was a setting as it came that way in 1.6.5.

In previous version of Affinity Photo (1.6.5), scrolling the mouse wheel in both Develop and Photo Personas enlarged and reduced the size of the displayed image, which meant that resizing and moving about the image could be done with one hand on the mouse. In 1.7.0.258, however, scrolling the mouse wheel just moves the image up and down the screen. So to resize, now have to use two hands on the keuboard for Ctrl+1, Ctrl+0, etc., andf then back on the mouse to move around the image, which is much less convenient.