Step 3: If you want to create a vertical or horizontal line, hold down SHIFT while you click and drag. Step 2: Click and drag to create a straight line. Step 1: After opening a new canvas, click on the Straight Line Drawing Mode Icon located to the right of the Stabilizer. It is easy to turn on and off, and can be a great tool for creating perspective grids, isometric illustrations, and more.įollow the steps below to create a straight line in Paint Tool Sai using this mode. Straight Line Drawing Mode is a drawing mode in PaintTool SAI that allows you to draw only using straight lines. Enjoy your line! Method 2: Using “Straight Line Drawing Mode” Step 5: Hold down SHIFT and click where you would like your line to end. Step 4: Click anywhere on the canvas where you would like your line to start. Step 3: Select your desired line stroke width. Step 2: Click on the Brush or Pencil tool icons. Step 1: Open PaintTool SAI and create a new canvas. The simplest way to create straight lines in PaintTool SAI is using the shift key, and here is how to do it, step by step. You can edit your straight lines in PaintTool Sai using the Linework Line tool.Use SHIFT while in Straight Line Drawing Mode to create straight horizontal and vertical lines.Use SHIFT to create straight lines when using the brush tool.Method 2: Using “Straight Line Drawing Mode”.