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Silhouette Studio Knife Tool: How to Change the Thickness

You guys...seriously sometimes I just wish someone would come along and be like 'HELLO, Melissa...you CAN do that!'  Please tell me I am not the only one who has been wishing upon a star for a way to change the width of the knife tool in Silhouette Studio

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Of course there is...and the secret lies in the Line Style tool. Because that makes sense.

In order to change the thickness of the Silhouette knife tool you will need Designer Edition - which gives you the ability to turn off auto-apply.

First you have to understand how the knife works and by that I mean we need to understand that the knife has some weight to it which means we lose a tiny bit of the design when the knife cuts through.
It becomes an issue when you need to slice a design BUT not lose any of the design - even that little bit from where the knife made the cut.

That's where changing the thickness of the knife slice comes in...you change it just like you would the line thickness: from the Line Style > Line Thickness tool.

Let's use this design as an example. It's a huge vinyl wall monogram I made for my daughter's bedroom. The problem is it's wider had 12" so I had to cut it in half and re-assemble the design after it was cut.

If I don't change the thickness of the knife - which is at a thickness of 1.4 pt by default -  when I go to put it back together it will be missing a tiny sliver and therefore won't line up exactly.

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It doesn't seem like much until you try to line the design back up and see you how important that little area is! The doesn't doesn't line up exactly as you can see.

silhouette studio vinyl wall decal knife tool splice 
Instead, what I need to do to prevent this (or at least make it less severe) is change the thickness of the knife before I apply the knifeIn Silhouette Studio Version 4 it's not quite as cumbersome because you can have multiple panels open at the same time, but in earlier versions of Studio it's a lot of back and fourth so stay with me. 

Open the design in Silhouette Studio.

Open the knife tool. With Designer Edition you'll get the extended window on the right. This is where you should scroll all the way down and uncheck "Auto Apply." It's checked by default.

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Use your mouse to draw the knife splice (I highlighted in green here). Because you have unchecked "Auto Apply" you have a chance to change the thickness of the knife.

Click the Line Style tool and adjust the Line Thickness down between 0.2 and 0.5pt.

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Now go to the Knife Tool again and at the bottom of the window click "Apply Selected Knife". (If it's greyed out, make sure the knife splice is selected.)
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You can see the knife slice is quite a bit thinner than the default and that means when the design needs to be lined back up - it's not nearly as obvious that a tiny sliver is missing. See how the circle on the left side is obviously missing a piece....same with the connection between the i and v?

how to use silhouette studio designer edition knife tool

Here's a side by side of the same knife in different thicknesses to show you another example.



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