Accessible PowerPoint (implementation guide)

4.4. Line spacing

The line spacing is at least 1.2 pt.

What does that mean?

Line spacing in PowerPoint refers to the vertical distance between the lines in a paragraph. For good readability, the line spacing should be at least 1.2 pt. or 120% of the character size. However, the line spacing should not be disproportionately large so as not to disrupt the flow of reading.

Why is it important?

Line spacing that is too small can impair the legibility of texts and cause visual overload. This can make it difficult for the eyes to focus on the next section of the text, which can lead to a reduced reading speed and a higher error rate. In addition, small line spacing can also lead to increased eye strain and fatigue, especially in longer texts.

Sufficient line spacing of at least 1.2 helps recipients who have difficulty reading or concentrating to follow the flow of the text and decipher the content better. It also helps to create a clear structure in the text.  Adequate line spacing makes it easier for the eyes to find the beginning of the line when skipping to the next line. 

How can I implement/check it?

To set the line spacing in PowerPoint, follow these steps:

1. Select the text for which you want to change the line spacing.
2. Click on the "Start" tab in the menu bar at the top.
3. Search for the "Paragraph" group and click on the "Paragraph" icon or, if you are using a Mac, click on "Line spacing".
4. A field opens. You can change the line spacing here.
5. If you require a specific line height, you can enter this in the "Dimension" field or use the arrows next to the field.
6. Click on "OK" to save the changes.