Hi PlaySmile,
These features are not available in current version of Lync 2013.
You can send a file or picture by doing one of the following:
a. Drag-and-drop the file or picture from your computer into the message window or text input area.
b. Copy and paste the file or picture from any Office program into the message window or text input area.
c. Press PrtScn on your keyboard to capture an image directly from your screen, then paste it into the message window or text input area.
Note: Your sent message will show a small representation of the file or picture. To open the file or see the full-size picture, the recipient clicks Save or Open, which transfers the file to their computer. Also note that embedded images only show up in one to one IMs, not group conversations.
I also tested with the new client Skype for Business, the feature that drag and drop pictures from any browser to Skype for Business is still not available, but the feature that copy/past pictures from browsers to Skype for Business is available.
Best regards,
Eric
Thank You Eric