To send an instant message to your Skype contact:
If you want to send a photo, just tap the icon in the bottom-left corner of the conversation window, select photo, and choose the photo you wish to send. You send video messages and share your location in the same way. You can also send emoticons in your messages -- just tap the icon and select the emoticon you want (if you don't see the one you want, check our full list). You can turn large emoticons on or off in app settings.
You can send and receive instant messages while you’re on a call. To IM the person you are calling, tap the IM icon to pull up the conversation window. You can maximize your call window again by tapping the arrow .
To IM someone else, tap the minimize icon in your conversation window to view your contacts pane. You can then choose the contact you’d like to IM within your Contact tab or Recent tab and IM them as normal. You can maximize your call window again by tapping the arrow .
If you wish to edit, copy, or delete a message, simply tap and hold on the message and select the option you want from the pop-up. You can edit or delete an instant message within 60 minutes after you've sent it.
If you wish to delete chat history for the entire chat, tap the chat header at the top of the screen and in chat options, tap Delete chat.
Learn how you can add particpants to existing chat conversations or send and receive messages within group IM conversations.
You can use basic text markup in chats to use special formatting:
The newest versions of Skype for iOS has push messaging enabled, which means you'll get a notification badge for new messages even if Skype is closed.
If you want to send a photo, just tap the icon in the top right of your screen.