You can easily modify the thickness, color, and style of any single line or all the lines in your drawing using the Line options under the Home tab.
First, select the line you want to modify by clicking on it.
You can also select all the lines in your diagram by clicking on Select under the Home tab and choosing "Select All Lines."
Once you have the line or lines you want selected, open the Line menu under the Home tab for a variety of options.
Setting Line Thickness
Under Design->Line->Line Thickness you can choose from a variety of Line thickness options. Choose one that best fits your needs.
If you click on More, you can set a completely custom line thickness using a hidden scale. The thickest line in the previous menu is 0.08 inches. If you want an even thicker version, make it 0.1 or more.
Here's a line with its thickness set to a super thick 1.0 inch setting.
Creating Dashed Lines
To create a dashed line, select the line and in Home->Line->Dashes choose a style of dashes.
Applying Color to Lines
To change the color of your selected lines, simply pick from one the options visible in the Line menu under the Home tab. Theme colors will coordinate with the current color scheme you have chosen.
You can also apply any color you want, just click on More Colors to bring up a color wheel or enter a specific RGB value.
Adding Arrows to Lines
To add arrows to a line or lines, select the line and in Home->Line->Arrowhead choose the direction of the arrow to apply.
If you click on Custom and you'll be able to:
- Set the size of your arrow
- Choose its displacement (whether it touches the shape or not)
- Make it so that the style of arrow on both sides of the line is different (useful for technical diagrams)
- Choose a unique arrow style
Adding Gradients to Lines
In addition to changing the color of a line, you can also apply a gradient. To do so, click on Home->Line->Gradient to bring up a dialog of gradient options.
In the Set Line Gradient dialog you can choose a preset gradient color scheme and choose its direction and style (Linear or Radial).
You can also create a custom gradient at the bottom of the dialog by specifying the two colors of the gradient using a color picker.
Here's the line with the linear blue gradient going from left to right:
Adding Textures to Lines
You can also choose a texture as a filler for your line. There are dozens of built-in textures to choose from.
To do so, click on Home->Line->Textures to bring up a dialog of texture options. Select the texture you want and click Ok.
Here's a line with a fabric texture applied.
Changing Line Opacity
The opacity slider defines the opacity/transparency of the line. The more transparent the line, the more the underlying background or other shapes or lines will show through it. When opacity is at 100% the line is completely opaque or not transparent. When opacity is set to 0% the line is completely transparent and invisible.
Use the slide to create the look you want.