My friend sent me an image saved as a .pdf file made in Photoshop.

I loaded the image into GIMP and made a very small change to the image.

I would like to save the file once again as a .pdf file and NOT LOSE ANY image quality.

The file sent to me was approx. 4M. When I save the file in GIMP the file size becomes approx. 312K, or less than 1/10 the size of the original file. When I look at the two images, the GIMP image has lost quality.

Can someone please tell me how I can do this? Thanks!

....
More info.
I also have the same image file as a .tiff file (coming from Photoshop).
When I open the file in GIMP and edit it (small edit) I can save it as a .tiff
and the file size remains the same! Approx. 4M.

But, when I try to save it as a .pdf file, the file size becomes approx. 312K !
How did my friend save it in Photoshop as a 4M .pdf file,
and how can I save it in GIMP as a 4M .pdf file?

If I have a selection, for simplicity sake we'll start with a 50 pixel wide line at a 45 degree angle from top left to bottom right. How do I create a path that traverses the approximate center of the selection and is one pixel wide?

I know how to create a selection, shrink a selection, create a path from a selection. But simply shrinking will either end you up with gaps in the path or with areas that are wider than a pixel in the path if there is any deviation in the width. I am fine if this is something I need to do programatically (learning Python, know multiple other languages) if someone can point me in the right direction or the terminology to look for to execute this type of operation. I am no great mathematician, but I can muddle through most geometry and basic trig. And I am fine with putting in time to experiment as necessary.

Edit: Using GIMP 2.10.22 but can upgrade if needed, Win 10 64 bit.

- Ernie

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I updated my MacBook last night to Big Sur and tried to use Gimp but the program didn't work at all. I'm not able to select by color, Fill with BG/FG nor am I able to edit any images. I've reinstalled the program multiple times in hopes of it working again but all failed, is anyone else facing anything like this? I've updated my laptop before as well but never faced any problems like this. Please let me know ASAP! thanks  

I drew an SVG > exported as PNG > opened in GIMP > saved as .gbr

The brush loads fine on GIMP, but sadly it is always a black imprint, no matter what Foreground colour I choose. I remember setting the colour to null somewhere during the process. It will be nice to learn how to fix this and make the brush honour the FG colour. Thanks.

Since the last couple of days, possibly after 2.10.22 update, only the " Basic " set of brushes are visible. Others are there in the .config folder and they are set properly under folder path. But only " Basic " set it visible / selectable. Others are greyed out. I haven't touched any settings in a while. Any help on this will be awesome. Thanks.

Quote:  Path summary Warning
Path "A8" [4]:
(0.0, 0.0) <- 2 : 154.0 : OPN -> (0.0, 154.0)
(154.0, 0.0) <- 2 : 154.0 : OPN -> (154.0, 154.0)
(0.0, 0.0) <- 2 : 154.0 : OPN -> (154.0, 0.0)
(0.0, 154.0) <- 2 : 154.0 : OPN -> (154.0, 154.0)

  Path summary Warning
Path "this path works" [1]:
(199.0, 145.0) <- 4 : 224.0 : CW  -> (199.0, 200.0)

Hi
I will try to create my own boardgame and the background shall be a map. I would like it to look interesting and playful, something similair to the attached image. 
Does anyone have an idea of how i can turn a real map, eg Google maps, into this? It doesnt have to look exactly as the image but something that is suitable for a boardgame.

Maybe is possible to create a "stroke pattern" as the coastline or what do you suggest is the best approach? 

How to mention person on forum in text? Symbol @?

Hello,

I need to upload a mask to my shopify store for my clothing products so I can have a live preview of a chosen color on the product. my question is, can someone point me to documentation on how to make a layer mask of a logo that is on an image? I've tried googling the solution but I may not be using the right terms because I can't seem to find what I'm looking for. 

so for example, I have uploaded a picture of one of my hats. I have a 10 main colors that the Hat can be but the logo can be any color. Rather than uploading a ton of different images I am trying to have one picture for each product and then have the color previews so users can choose their color scheme. so how can I go about creating a mask of the logo on the image attached so I can upload to to shopify for the live preview? 

Here is a youtube video of something similar to what I'm looking to do. from 0:45-0:50 is what I am looking to create but for the logo attached. 
https://www.youtube.com/watch?v=GM63x8NKL68&t=55s


I really hope all my ramblings made sense but if not please let me know so I can clarify. 

Thanks in advance for your help!

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I have a requirement where I have to change the colour of this purple to green and yellow. I tried " selecting by colour, delete and then fill " . Then tried " Colorize ". Both had its own issues. Mainly burrs on the edges in the first case and the cloud colour also changing in the second method. So I gave up miserably and tried to select white, add a layer on top and then fill it with white. So that I get cloud and it is easier for me to manage the rest. But as you can see in the image above, there is this strange fog at the edges of the fill. Kindly help me fix it. Thanks.