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. (Not available in Skype for Web)
     
• 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. (Not available in Skype for Web)
     
• 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.
  • Control 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. 
  • Customize file auto-download settings. (Not available in Skype for Web)
     
• 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, a link to help content, current Skype Status, and how you can provide any feedback.