# Images
You can insert images into your page, then choose their size and whether to align them to the left, center, or right. You can also optionally include alt text and/or a caption on your image block.
{% hint style="info" %}
**Tip:** For accessibility purposes, we recommend setting alt text for your images.
{% endhint %}
### Example of an image block
Example of an image block with a caption
### Uploading an image
There are two ways to add images to your content:
1. Drag and drop the image from your file management system directly into an empty block on your page.
2. [Add an image block](https://gitbook-v2-q67etdj25-gitbook.vercel.app/url/gitbook.com/docs/creating-content/blocks/..#inserting-a-new-content-block) to your page and use the **Select images** side panel that appears on the right of the window.
If you follow the second process, you can choose to upload a file, select a previously-uploaded file, paste an image URL or add an image from [Unsplash](https://unsplash.com/) using the built-in search.
{% hint style="warning" %}
GitBook allows you to upload images up to 100MB per file.
{% endhint %}
#### Create an image gallery
Adding more than one image to an image block will create a gallery. To do this, open the block’s **Options menu** and choose **Add images…** to open the **Select images** side panel again.
To delete an image from a gallery, open the **Edit menu** on the image you want to delete and press the **Delete ⌫** key.
### Adding images for light & dark mode
You can set different images for the light and dark mode versions of your published site. GitBook will automatically display the correct image depending on the mode your visitor is in.
To add an image for dark mode, hover over your image, open the **Edit menu** and click **Replace image** .
In the drop-down menu, choose **Add image for Dark mode**. Once you’ve set this, you can replace either image from this same menu.
{% hint style="warning" %}
**Note:** GitBook doesn’t currently support light and dark mode images for certain cases, including page covers or image covers on [cards](https://gitbook-v2-q67etdj25-gitbook.vercel.app/url/gitbook.com/docs/creating-content/blocks/cards).
{% endhint %}
### Light and dark mode images through GitHub/GitLab Sync
You can also add light and dark mode images in Markdown through HTML syntax (`` and ``).
For block images, use the `` HTML element with a `` and `` in it:
```html
Text before
Caption text
Text after
```
For inline images (images that sit inline with text), use the `` HTML element with a `` in it:
```html
Text before the image
and text after the image
```
{% hint style="warning" %}
**Note:** We don’t yet support [GitHub-only syntax](https://github.blog/changelog/2021-11-24-specify-theme-context-for-images-in-markdown/) through `#gh-dark-mode-only` or `#gh-light-mode-only`.
{% endhint %}
### Resizing
To resize your image, hover over it and open the **Edit menu** . Click the **Size** button to change the size of your image from the available options.
Resize an image
* **Small** – 25% of the image size
* **Medium** – 50% of the image size
* **Large** – 75% of the image size
* **Fit** – Removes all size specifications and displays either at full size or capped at a maximum width of **735** **pixels** for larger images.
If your image is wider than the editor, GitBook will limit the image’s width to the editor’s width instead, and resizing will be based on this limit.
{% hint style="info" %}
**Note:** When resizing images in an image gallery, the results can differ from resizing an individual image.
{% endhint %}
{% hint style="info" %}
You can make image blocks [span the full width of your window](https://gitbook-v2-q67etdj25-gitbook.vercel.app/url/gitbook.com/docs/creating-content/blocks/..#full-width-blocks) by clicking on the **Options menu** next to the block and choosing **Full width**.
{% endhint %}
### Resizing images through Git Sync
If you want more control over the sizing of your image, you can specify the exact size using Markdown in GitHub or GitLab.
When we export an image, we use the HTML tag ``. As per the specifications, we can specify the dimensions of the image using the `width` and `height` attributes, which only accept values in pixels or a combination of a number and a `%` sign.\
\
Valid variants for specifying the image dimensions are:\
\
`` Sets the image to 100 pixels wide\
`` Sets the image to full size (although this will be limited by the editor)
### Aligning images
By default, image blocks will show your image at its full size, aligned centrally.
To change the alignment of an image, open the block’s **Options menu** and choose the alignment you want. This will only affect images that are narrower than the editor, or images you’ve [resized](#resizing).
### Framing images
You can add a frame to image blocks to give your images a consistent look and visually separate them from their surrounding content.
Framed images can have captions, and show a subtle grid behind the caption.
To add a frame to an image, hover over it, open the block’s **Options menu** and enable the **With frame** toggle.
{% hint style="info" %}
**Good to know:** You can only frame single images in a block. Image blocks that contain multiple images and inline images cannot have frames.
{% endhint %}
### Representation in Markdown
```markdown
//Simple Block
//Block with Caption
//Block with Alt text
//Block with Caption and Alt text
GitBook Logo
// Block with framed image
//Block with different image for dark and light mode, with caption
Caption text
```
