You want to add a double stroke to a shape in PowerPoint, but the standard outline options only let you set a single line. The compound type feature in PowerPoint lets you combine two or more outline strokes on one shape, creating a double line effect. This article explains what compound outlines are, how to apply them, and what to watch out for when using them in presentations.
Key Takeaways: Applying Double Stroke to Shapes in PowerPoint
- Shape Format > Shape Outline > Weight > More Lines: Opens the Format Shape pane where compound type is available.
- Compound type dropdown in Format Shape pane: Choose Double, Triple, or other compound line styles.
- Adjusting individual stroke colors: Use the Gradient line option or separate shape layers to simulate different colors for each stroke.
What Is a Compound Outline in PowerPoint?
A compound outline is a shape border that consists of two or more parallel lines instead of a single solid line. PowerPoint calls this feature “compound type” and offers four options: Single (the default), Double, Triple, and Thick Thin. The Double option creates two parallel strokes that appear as a single combined border. This effect is useful for emphasizing shapes in diagrams, creating custom callout boxes, or adding a decorative edge to titles and banners.
The compound type setting is part of the shape outline properties, not a separate shape or object. You apply it directly to any closed shape (rectangle, oval, arrow, etc.) or open line (curves, freeform). The feature works in PowerPoint 2013, 2016, 2019, 2021, and PowerPoint for Microsoft 365 on Windows and Mac.
How Compound Type Works
When you select Double, PowerPoint draws two lines side by side inside the shape’s border area. The total width of the outline equals the weight you set, divided evenly between the two lines. For example, a 6 pt weight with Double compound type produces two 3 pt lines with a small gap between them. The gap is automatically calculated and cannot be adjusted manually. The lines always share the same color unless you use a gradient or layer multiple shapes.
How to Apply a Double Stroke to a Shape in PowerPoint
Follow these steps to add a double outline to any shape.
- Select the shape
Click the shape you want to modify. If you have not inserted a shape yet, go to Insert > Shapes and choose any closed shape. - Open the Format Shape pane
Right-click the shape and choose Format Shape. Alternatively, select the shape and press Ctrl+1 on your keyboard. - Go to Line settings
In the Format Shape pane, click the Fill & Line icon (a paint bucket). Then click Line to expand the line options. - Select Solid line
Under Line, click Solid line to enable custom outline settings. The compound type option becomes active. - Choose Double from the Compound type dropdown
Locate the Compound type dropdown near the bottom of the Line section. Click the dropdown and select Double. The shape outline immediately shows two parallel lines. - Adjust the outline weight
Set the Width (weight) to a larger value such as 6 pt or 8 pt so the double stroke is clearly visible. The minimum weight for Double to appear distinct is about 3 pt. - Set the outline color
Choose a Color from the color picker. Both strokes use the same color. To apply different colors, see the Common Issues section below.
If You Want Different Colors for Each Stroke
PowerPoint does not allow separate colors for individual lines within a compound type. The entire compound outline uses a single color. To create a double stroke with two different colors, use a workaround with multiple shape layers.
- Duplicate the shape
Select the shape and press Ctrl+D to duplicate it. Place the duplicate exactly on top of the original by aligning both shapes using Format > Align > Align Center and Align Middle. - Remove the fill from both shapes
Select each shape, go to Shape Fill > No Fill. This makes the interior transparent so only the outlines are visible. - Apply Double to the bottom shape
Select the bottom shape, open Format Shape, and set Compound type to Double. Give it a weight of 6 pt and your first color. - Apply Single to the top shape
Select the top shape, set Compound type to Single. Give it a weight of 2 pt and your second color. Position it so it sits in the gap between the two double lines. Adjust the weight and position manually until the top line aligns with one of the double lines.
Common Issues and Limitations With Compound Outlines
Double stroke does not appear on the shape
If the shape outline still looks like a single line after selecting Double, the weight is too small. Increase the Width to at least 3 pt. Below that, the two lines overlap and appear as one. Also ensure you have selected Solid line, not No line or Gradient line.
Compound type option is grayed out
The Compound type dropdown is only active when Solid line or Gradient line is selected. If the option is grayed out, click Solid line or Gradient line first. Also check that the shape is not grouped. Ungroup the shape before applying compound outlines.
Lines look jagged or blurry when printed
Compound outlines with high weight values (above 8 pt) can appear jagged at small print sizes. To avoid this, keep the weight between 3 pt and 6 pt for printed handouts. For on-screen presentations, higher weights are fine because screen resolution is lower.
Cannot add a compound outline to text boxes
Text boxes in PowerPoint do not support compound outlines on the box border. To create a double border around text, draw a rectangle shape behind the text box and apply the compound outline to the rectangle. Then remove the text box border.
Compound Type Options: Double vs Triple vs Thick Thin
| Item | Double | Triple | Thick Thin |
|---|---|---|---|
| Number of lines | 2 parallel lines | 3 parallel lines | 2 lines with different thicknesses |
| Best weight range | 3–8 pt | 6–12 pt | 4–10 pt |
| Color options | Single color only | Single color only | Single color only |
| Common use | Emphasizing key shapes, callout boxes | Decorative borders, certificates | Faux 3D effect, nested borders |
You can now apply a double stroke to any shape in PowerPoint using the compound type feature. Start by selecting the shape, opening the Format Shape pane, and choosing Double from the Compound type dropdown. For presentations that need colored double strokes, use the layered shape workaround described above. An advanced tip: combine compound outlines with shape effects like Shadow or Glow to make the double stroke stand out even more on busy slide backgrounds.