Jump to content
You must now use your email address to sign in [click for more info] ×

Affinity Photo - How to Keep An Image the Same Size after Editing

Recommended Posts

I've noticed that Affinity Photo has a tendency to change an image's format and size after I've imported it. Let's say that I'm working on a PNG file sprite for a game. When I bring it into Affinity, it changes the format to .afphoto and the only way to save it back to PNG is to export it in PNG format, therefore changing the file size. How do I keep existing images the EXACT SAME format and size?

Thank you!

Link to comment
Share on other sites

You would normally use File > Export to save it as a PNG file, though File > Save will work (and overwrite the original) if you start with a PNG file and haven't added any layers.

But you can never guarantee, with any program, that the file size won't change when you save a PNG. That is entirely up to the method of file optimization chosen by the program, and the file content (including colors used). From what I've read, Affinity Photo's optimization for file size is not as strong as some other programs, so you might need to use an additional png optimization program to get the file size smaller, if you really need to.

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
    Desktop:  Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 

    Laptop:  Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
iPad:  iPad Pro M1, 12.9": iPadOS 17.3, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.3.1

Link to comment
Share on other sites

When you Open a PNG in Photo the document type is still PNG.
As mentioned by Walt above, if you Save that document it will be saved (and overwritten) as a PNG.
However, if you Save As then it will, by default, set the document type as AFPHOTO.
I don’t think there’s a way of overriding either of the above functionalities.
However, every document has a default Slice in the Export Persona which you can set to whichever file type you want (defaulted to PNG for a PNG file) and whatever settings you want.
This way you can edit your image as a Photo document (AFPHOTO), keeping all of your layers etc, and very quickly export via the Export Persona in a way that is consistent.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

Terms of Use | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.