Add Images to Your Book Content

Lacuna supports PNG, JPG, and WebP formats up to 10MB, with automatic optimization to reduce file size.

How to Add Images

Using the Toolbar

1. Click the image icon in your editor toolbar
2. Upload a new image or Browse Existing Images from your gallery
3. Position the image where you want it

Copy and Paste

Paste images directly into the editor:

• From the web — Right-click an image, select Copy Image, then paste
• From your computer — Copy an image file and paste it into the editor

Best Practices

Use PNG, JPG, or WebP images under 10MB. Smaller files perform better and cost less to distribute. Lacuna automatically compresses images while maintaining visual quality.

Image Options

Select any image to access these options:

Option	What It Does
Alignment	Position left, center, or right
Float	Wrap text around the image
Width	Set maximum width percentage
Alt Text	Add accessibility description
Link	Make the image clickable
Caption	Add text below the image
Change	Swap to a different image

Alt Text for Accessibility

Alt text helps visually impaired readers understand your images. Add it to every image in your book.

1. Click on any image
2. Select “Set Alt Text” from the bubble menu
3. Enter a clear description of the image
4. Save your changes

What do the visual indicators mean?

Images missing alt text display a red border and warning icon in the bubble menu. Once you add alt text, the border returns to normal.

How do I find images missing alt text?

Use the Elements tab in the section sidebar to find images without alt text. Look for the alert icon next to flagged images.