docs: add missing links for some files

There were some files which where not included in any links. As this makes them rather unuseful this commit adds them to the appropriate places.

Signed-off-by: Philip Molares <philip.molares@udo.edu>

docs/content/references/slide-options.md

@@ -0,0 +1,163 @@
+# Slide Separators
+
+If you're getting started with reveal.js slides, there are a few things you need to know.
+
+There are two types of slides, those that transition horizontally and those that transition vertically (subslides).
+
+The following separators are used for each in the HedgeDoc syntax:
+
+```markdown
+# First Slide
+
+---
+
+# Next slide
+
+----
+
+## Subslide
+```
+as you can see, horizontal transitions are separated by `---` and vertical transitions by `----`
+
+## Basic YAML header
+It's possible to customise the slide options using the YAML header in the slide markdown.
+
+eg:
+```yaml
+---
+title: Example Slide
+tags: presentation
+slideOptions:
+  theme: solarized
+  transition: 'fade'
+  # parallaxBackgroundImage: 'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg'
+---
+```
+make sure to have two spaces only at the start of the listed slide options.
+
+you can comment out options with a `#`
+
+### Some other options
+
+```markdown
+# Display controls in the bottom right corner
+controls: true
+
+# Display a presentation progress bar
+progress: true
+
+# Set default timing of 2 minutes per slide
+defaultTiming: 120
+
+# Display the page number of the current slide
+slideNumber: false
+
+# Push each slide change to the browser history
+history: false
+
+# Enable keyboard shortcuts for navigation
+keyboard: true
+
+# Enable the slide overview mode
+overview: true
+
+# Vertical centering of slides
+center: true
+
+# Enables touch navigation on devices with touch input
+touch: true
+
+# Loop the presentation
+loop: false
+
+# Change the presentation direction to be RTL
+rtl: false
+
+# Randomizes the order of slides each time the presentation loads
+shuffle: false
+
+# Turns fragments on and off globally
+fragments: true
+
+# Flags if the presentation is running in an embedded mode,
+# i.e. contained within a limited portion of the screen
+embedded: false
+
+# Flags if we should show a help overlay when the questionmark
+# key is pressed
+help: true
+
+# Flags if speaker notes should be visible to all viewers
+showNotes: false
+
+# Global override for autolaying embedded media (video/audio/iframe)
+# - null: Media will only autoplay if data-autoplay is present
+# - true: All media will autoplay, regardless of individual setting
+# - false: No media will autoplay, regardless of individual setting
+autoPlayMedia: null
+
+# Number of milliseconds between automatically proceeding to the
+# next slide, disabled when set to 0, this value can be overwritten
+# by using a data-autoslide attribute on your slides
+autoSlide: 0
+
+# Stop auto-sliding after user input
+autoSlideStoppable: true
+
+# Use this method for navigation when auto-sliding
+autoSlideMethod: Reveal.navigateNext
+
+# Enable slide navigation via mouse wheel
+mouseWheel: false
+
+# Hides the address bar on mobile devices
+hideAddressBar: true
+
+# Opens links in an iframe preview overlay
+previewLinks: false
+
+# Transition style
+transition: 'slide' 
+# none/fade/slide/convex/concave/zoom
+
+# Transition speed
+transitionSpeed: 'default'
+# default/fast/slow
+
+# Transition style for full page slide backgrounds
+backgroundTransition: 'fade'
+# none/fade/slide/convex/concave/zoom
+
+# Number of slides away from the current that are visible
+viewDistance: 3
+
+# Parallax background image
+parallaxBackgroundImage: ''
+# e.g. "'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg'"
+
+# Parallax background size
+parallaxBackgroundSize: ''
+# CSS syntax, e.g. "2100px 900px"
+
+# Number of pixels to move the parallax background per slide
+# - Calculated automatically unless specified
+# - Set to 0 to disable movement along an axis
+parallaxBackgroundHorizontal: null
+parallaxBackgroundVertical: null
+
+# The display mode that will be used to show slides
+display: 'block'
+```
+
+## Customising individual slides
+
+custom background image:
+
+```markdown
+---
+
+<!-- .slide: data-background="https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg" -->
+#### testslide
+
+---
+```