Background Images
Full Background Image


Fit Background Image


Multiple Background Images




Text on Images

# Text on Images
Setting text on images applies a filter to the image to make the text more readable.

Disable Filter

# Disable Filter

Zoom In

# Zoom In

Split Slides

# Split Slides
Use the `left` or `right` modifiers to place the image in the left or right half of the slide, respectively.

Adjust Filters

# Force Apply Filter
Use the `filtered` keyword to apply the theme's filter to an image that isn't filtered by default.

Built-in Image Modifiers





Use bn (or bw) for black-and-white, vivid for boosted color/contrast,
and noir/chrome/fade for Core Image photo effect presets.
These modifiers replace the theme filter for that specific image.
Saturation


Use saturation(value) to set saturation directly (0...2, clamped).
When combined with bn or vivid, explicit saturation(...) wins for saturation.
Composable Filters


Mix and match filters freely. Deckset applies them in a consistent order, so you always get the same result.
Additional supported controls include:
blur(0...1)contrast(0...2)brightness(-1...1)exposure(-2...2)vignette(0...1)sepia(0...1)sharpen(0...1)
Split Slides with Fit

# Split Slides
Combine `left` or `right` with the `fit` keyword or a percentage to adjust the image scaling.

Alpha
Use alpha on an image to specify its opacity.

Global Background Image
To apply a background image to every slide in your presentation, simply add the background-image command at the very top of your Markdown file:
background-image: image2.jpg
(rest of your content)