How To Thicken Lines In Photoshop

Are you a line art enthusiast, but errors in line thickness annoy you? We sympathize with you but also intend to offer solutions that help you continue with your passion for line art. If you want to learn how to make lines thicker or thinner, you are in the right place. 

To make lines thicker, open the art. Go to Filter > Other > Minimum. Set the pixel radius here to make the lines as thick as you wish. To create thinner lines, go to Filter > Other > Minimum. Set the pixels, keeping in mind that the higher you go, the thinner the lines will get. 

To learn other ways of achieving this, continue reading. 

How To Thicken Lines In Photoshop

Let us dive straight into the procedure of thickening your lines in Photoshop. This method applies to the entire canvas. Every line in the canvas will be affected by the changes you make. 

Look at the comprehensive guide below to ensure you get the whole procedure right and thicken lines successfully. 

  1. Open up the art that you wish to work with in Photoshop.
  2. In the panel on top, choose Filter.
  3. Here, go to Other and then choose Minimum from the drop-down menu. 
  4. A window will appear showing a zoomed-in version of your art. 
  5. In the Radius section, set in a specific number of pixels. This will be the thickness. 
  6. You can also use the slider to increase the thickness of the lines in your art. 
  7. Once you are happy, click OK. 

How To Make The Lines Thinner In Photoshop

In the previous method, you may have tried to slide the slider to the far left to make your line thinner, but it must not have made a difference. This is because there is a separate tool that Photoshop has given its users. 

Look at the instructions below to make your lines thinner using the tool. 

  1. Open the art that you are going to be working with.
  2. In the panel on top, go to Filter and then choose Other. 
  3. In the drop-down menu, choose Maximum. 
  4. A window will appear, which will show the lines zoomed in. 
  5. In the Radius section, set a number that works for you. 
  6. Remember, the higher you go, the thinner the lines will get. 
  7. Once satisfied, click OK. 

To learn more and see a visual tutorial of these steps, it might be helpful video to watch along with your work. 

How To Thicken Lines Using The Expand Selection Tool In Photoshop

Did you think that was it? We have more than one way to perform the same procedure. The expanded selection method provides more control to the artist. Using this tool, you can select specific lines or different canvas parts to apply a particular effect. 

To think of lines using the expand selection tool, follow along with the steps below. 

  1. Select the line you want to thicken using the lasso or marquee tool. 
  2. You can also hold the Command or Control keys and click on the thumbnail of the art in the layers panel. This can be found on the right side of your window. 
  3. Go to Select > Modify > Expand.
  4. In the Expand Selection dialog box, enter the number of pixels by which you want to expand the selection.
  5. Click OK.
  6. The selection will now be thicker. 

How To Make The Lines Thinner Using The Contract Selection Tool In Photoshop

Yes, we also have another way to make lines thinner in Photoshop. Like the expand selection method, the contract selection method also gives a lot of control to the user in deciding which lines to target when making the lines thinner. 

To use this to your advantage, follow the instructions we have laid out below. 

  1. Select the lines that you want to make thinner. 
  2. Use the lasso tool or press and hold the Command or Control key while clicking on the layer thumbnail. 
  3. Now go to Select, then Modify, and then Contract. 
  4. In the dialog box, fill in the number. The higher you go, the thinner the lines will get. 
  5. Click OK. 
  6. You may not see any change. For the effect to reveal itself, a layer mask is needed. 
  7. In the Layers panel, click on the Layers Mask icon. 
  8. The line will look thinner now. 


You no longer have to go through the ordeal of redoing your entire piece because the thickness of the line was not right. You can always go back and forth with it now, using the methods we elaborated on in this article.