General settings

Settings → General:

Setting
Default Username	pre-filled for new hosts
Default Port	pre-filled for new hosts (usually 22)
Connection Timeout	seconds to wait for a server when connecting
Max Concurrent Transfers	transfers that run at once; the rest queue (default 3)
Show Hidden Files	show dotfiles in SFTP
Confirm Before Delete	ask before deleting files
Restore Sessions on Launch	reopen the sessions you had open when you quit
Open On	the section the window opens on
Server Drag & Drop	Copy or Move when dragging between servers — see Server to server
Help improve Termini	the weekly anonymous ping — see Privacy
Sync	iCloud or a shared folder — see Sync between Macs
Backup	Export… / Import… — see Backup