You can access your Skype settings from any platform or device, but not all settings are available to change on every platform.
 

• Account & Profile
  Control your profile picture visibility and view your account information. 
   
• General
  Change your language, choose your startup and close options, Cortana settings and view available Skype Keyboard Shortcuts.
   
• Appearance
  Choose your color, light or dark modes and light or dark high contrast, enable compact list mode and show user and conversation icons.
   
• Audio & Video (desktop only)
  Choose your camera settings, change the sensitivity of your microphone and adjust your speaker levels. 
   
• Calling
  Set up caller ID, call forwarding, voice mail, and other call settings. 
   
• Messaging
  Turn read receipts on or off, change how emoticons appear, change your text size, and other IM settings. Auto download options can also be found here, along with the ability to have images available when you view a message by controling when to download it - never, using WiFi, or using WiFi and cellular data. 
   
• Notifications
  Increase, reduce, or eliminate what events Skype alerts you to and how Do Not Disturb functions. 
   
• Contacts
  Manage your blocked contacts and Privacy settings for contacts.
   
• Help & Feedback
  View your current Skype version, find links to help content, current Skype Status, and how you can provide any feedback.