Crop entire document all layers in Photo v1

[FlynnAD]

Is it possible to have an Affinity Photo V1 document with many layers, and to crop the entire document at once, DELETING all the extraneous data? I do not have a need for exporting the individual layers within this file in this particular example. I would just use this file as reference. But all the layers within this document are bigger than I need to see or ever have, so I'd like to crop them down all at once, rather than doing a Raster+Trim layer by layer. Currently, if I just crop a layer and save the document, the document still retains the full size of all the other images, bloating up the file size. This should be doable in a one- or two-click command, shouldn't it?

[Old Bruce]

No this is not a simple operation in Photo. I truly wish it were. It is a major failure for all the applications in the suite.

[loukash]

You can do it relatively fast with the aid of snapping:

1. set snapping to spread, object bounding boxes, force pixel alignment (important!) but disable "move by whole pixels" (very important although somewhat counterintuitive!)
2. for each image you want to crop, create a vector shape (usually rectangle) with solid fill that snaps to the spread on the outside as well as to the image bounding box on the inside of the canvas
3. in the Layers panel, crop-mask each image layer with the corresponding rectangle (can be any shape, in fact)
4. select all the crop-masked images in the Layers panel and rasterize all at once from the context menu; they will not merge. 

[carl123]

2 hours ago, FlynnAD said:

rather than doing a Raster+Trim layer by layer.

V2 allows you to Rasterise & Trim multiple layers at the same time, unfortunately V1 does not

[FlynnAD]

That function alone was worth the V2 upgrade. Thanks @Carl123.