How Can I Delete the Call History on Yahoo Messenger?
- 1). Open Yahoo! Messenger, click the "Contacts" menu and then select "Voice Messages & Call History."
- 2). Select the user whose call history you wish to erase by clicking on his name.
- 3). Select a call record to delete by left-clicking on it and then clicking the black "X" button on the menu. If you want to delete multiple call records, click on the first call record you wish to delete and then press and hold the "Shift" or "CTRL" buttons and then click on another call record in the history list. You can also press "CTRL" and "A" to select all of the logs. Once you have selected the logs you want to erase, click the black "X" button.
Source...