I have a similar question (figured I'd post here in this thread rather than start a new post)... What I need regarding Cropping is the ability to crop, both vertically and horizontally, by a single dimension. For example, I often create 600- or 635-pixel-wide images from photos, but have no need to specify a vertical dimension -- I just need the images to be a set width dimension (or a set heigh dimension, depending). Photoshop would let you crop by one "edge" as well as save these as crop presets. I'm new to Affinity Photo, but is this something that's available already and I'm just not seeing it, or is this something that's coming in a future update?
Thanks!
-William