Step 1: Locate the settings gear icon in the top left.
Step 2: Locate the 'Drawing Style' tab
Step 3: Scroll to the bottom and locate the 'L-Seam' and 'T-Seam' options on the right side.
Step 4: For these two options you can select the thickness and pattern that you would like.
Step 5: Save at the bottom right and exit out of the menu to see your changes.