From left to right :

• Site Manager : launches site manager window
• Disconnect : disconnect from current session, if no connection is already established an alert dialog pops up for notification.
• Start upload : Enabled when a slide on local HDD is selected, it initiates an upload to the remote site PMA.transfer is actually connected to (a couple of checks are operated before an upload can be started : duplicate slide name, slide already being uploaded, no connection…)
• Stop upload : Enabled when there are active uploads running, it aborts all current running uploads.
• Start download : Enabled when a slide on the remote site is selected (the remote site on the right that PMA.transfer is actually connected to), it initiates a download to the local site (a couple of checks are operated before a download can be started : duplicate slide name, slide already being downloaded, no connection…)
• Stop download : Enabled when there are active downloads running, it aborts all current running downloads.
• Clear log : Clears logging messages in the text area below connection text fields
• Switch Mode : To switch between a PMA.core server and Pathomation cloud (it operates the necessary disconnections if required)