Affinity Designer: compacting pixel layers by cropping/downsampling

[F_Kal]

Hi,

I wonder if there is some way to automatically crop/trim and downsample pixel layers to their visible portion and document dpi resolution so that the affinity designer file isn't bloated beyond necessary?

 I've found that Rasterize Layer does the downsampling, but when you have hundreds of such layers, it's hard to keep track which ones have been rasterized and which ones I've missed!

Any function already in the software that I've missed?

Thanks,-Fotis

[A_B_C]

Basically, you could group your layers and rasterize the entire group. But you will lose the document structure, of course. Everything will be baked into one pixel layer. 

In addition to your thoughts, I wonder if it would be possible to add a Freeze Button to layers as it is available in digital audio workstations. Provided that rendering a pixel layer is less GPU-intensive as rendering a layer with vector shapes, live effects, adjustments, and so on – wouldn’t it make sense to have a button that would temporarily rasterise a layer to the document resolution while keeping all the vector shapes, effects, adjustments, … on record in form of a parameter list? Unfreezing a frozen layer would simply reconstruct the layer from the parameters. I don’t know if that would be technically possible, but I believe it could help speed up complex documents.

https://support.apple.com/kb/PH12937?locale=en_US