Manually adjust DPI in Snagit for Mac

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We use Snagit for screenshots in our technical documentation. We need to adjust the DPI in Snagit for Mac, not  - as the instructions indicate - to save the file and then open it in Preview or Photoshop to change the DPI.  We add borders and callouts to the screenshots, and they're done by writers, not graphics professionals. So if we export a screenshot to Preview, then adjust the DPI, we'd have to bring it back into Snagit to add the borders, numbers, and callouts (otherwise they will expand/contract when the DPI gets adjusted and be the incorrect size). But if we bring the newly resized DPI image *back* into Snagit, it will auto-adjust it to 76 (or whatever the default is). So we physically can't do our work and have to look for a different program.
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Karena O'Riordan

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Posted 2 months ago

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Joe Morgan

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I'll start by saying that I'm a Windows user.
However, are you aware that you can change the DPI capture settings of SnagIt? You would have to set up a custom profile to do this.

I may be misunderstanding your dilemma? But it seems like if you can capture at the proper dpi resolution to begin with. Then nobody will have to change the dpi settings moving forward. And that should resolve the problem.As you would already have the proper dpi settings from the moment of capture.

Regards, Joe
(Edited)
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davemillman

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The mac version is somewhat different, we don't have that IMAGE RESOLUTION option in the Effects pulldown.



It will be interesting to see if anyone has a solution for this. I'm not sure I understand the problem completely, but when I want something bigger I just zoom the screen larger before capture. In many cases (not all) this gives higher effective resolution to the captured image. 
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Joe Morgan

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Well ain't that a kick in the teeth. It's a basic function in my opinion. I was sure it would be a Mac feature as well {:>(   
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Chris Larson, Snagit Technical Product Manager

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Hi Karena O'Riordan and davemillman,

At the moment, we macOS automatically formats the captures and saved PNG files to 72dpi (Windows is typically 96dpi). So that's what we've been left with by default. We've heard others express the pain here before and we're looking to build an understanding of what people want. I'm going to restate your problem, so please let me know if I'm hearing you correctly:

Snagit can't change DPI, so you, a writer that just wants to use Snagit and not another tool, are forced to open the file in Photoshop and change the DPI. Likely to 300dpi for printing purposes. But since you just want to use Snagit, you bring it back into the app and add borders and mark it up with other drawing tools. But then when you save it with Snagit, it drops back down to 72dpi. Which is super frustrating.


If that's all correct, we could see a couple of different levels that we take this to. Let us know if any of these wouldn't work for you all:

Step 1 - At the very least, don't change the DPI of an image that's opened and saved in Snagit. Respect the DPI of the files.

Step 2 - Be able to adjust the DPI of an image from the resize menu (like Snagit Windows). This way you wouldn't have to use Photoshop. Step 3 - Add the Image Resolution effect to the Capture Window so you can capture and have your images adjusted to different DPIs before they go to Editor.

Does that sound right to you?
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Karena O'Riordan

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You restated it correctly. We add callouts, text, numbers, and borders to our images in Snagit.  But if you add those while it's at the default dpi of 72, when you then bring the image into Preview or Photoshop to change the DPI (in our case, to 200dpi) the weight and size of the stuff we added gets blown out of proportion.

The reason this came up is that the lower DPI images are causing our images to get cut off in the final output, so we asked writers to reset the dpi to 200. When they did that, all the callouts and borders got messed up. And if they try to add the callouts, etc AFTER they change the DPI to 200, they have to bring the image back into Snagit, which resets it to 72 again. 

So yeah, I think the optimal would be adding the exact same feature in Mac that you have in Windows: the ability to change the DPI of an image and THEN add callouts, etc. 
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Karena O'Riordan

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So Step 2 above is my strong preference.
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davemillman

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My use case is very different: 

I try to download an image/region/table/random content from a web site but cannot for some reason. So I manually zoom in to the window to maximize the image size before using Snagit to capture it.

I understand the many caveats to this approach, among them: 
  • A 640x480 image does not gain pixels when the browser zooms it to fill the screen
  • Different  browsers utilize different tricks to quickly scale images
This use case is so different from the OP that I'm almost sorry for hijacking the thread!