Migrating PS user - impressed (overwhelmed, in fact) by the deep wealth of configurable options in grids, guides and columns. All the more surprised therefore to be struggling to make any of them do the only thing anyone needs this function for.
Am I being stupid, or is there no way to toggle display of a simple, rectangular overlay - the kind you might need to make an object or selection rectangular, or centred in the frame - ie, sectioned by percentages, or divided equally across the width and height of the canvas? I can create a thousand (redundant, once-in-a-blue-moon) pretty shapes in many dimensions, but the moment I ask for a plain grid, Photo2 locks lines to a fixed number of pixels, whereas in any sane world, percentage selection is required.
Cruelly, in Distort > Perspective, the option to display a grid (pointlessly) creates a mesh that moves with the selection outline and underlying image.
This basic functionality can be jury-rigged by setting a fixed number of Column Guides (which, naturally operates by percentages to distribute evenly across the canvas), then setting the default 100px gutter to an invisibly small number (ie, 2px). Which would be workable, if those settings could be preset in Settings and applied to every image. But it can't: it's set image-by-image, and the default values are zero, zero, 100px - which helps no-one.
I'm willing to believe I've overlooked something obvious, but Photo2 seems to be able to do everything but the basic, most important function here.