You can use profiles to store settings for an individual VNC server or for a class of servers. For example, you might want to use full-color display for a server that is on your local area network, but drop down to 8-bit display for a remote machine.
You can also use profiles to specify your default encoding. VNC operates by transferring an image of the screen from the server to the client. This obviously requires lots of bandwidth. The better the encoding that you use to transfer this information, the less "lag" you'll experience while using the Chicken. Unfortunately, encodings that require less bandwidth also require more CPU utilization on both the server and client computers, so you may need to experiment to find the encoding that's right for your situation.
The different encodings are (in rough order of efficiency)
You can emulate a button click by holding down a modifier key while clicking your single button mouse using the Modifier Click emulation option. For example, you can use this to imitate the familiar control-click paradigm used on your Macintosh.
The Multi-Tap option lets you emulate a button click by tapping a particular modifier key quickly. For example, you can right-click at the current mouse position by tapping the Command key twice quickly.
The Tap and Click option lets you emulate a button click by tapping a modifier key a single time and then clicking the mouse. This is the behavior that was in previous versions of Chicken of the VNC, so you may already be accustomed to it. Once you've tapped the modifier key, the mouse cursor will change to indicate that a mouse click will be emulated. You can cancel emulation by waiting for it to timeout, or by pressing the Escape key on your keyboard.
If you don't wish to use mouse button emulation, you can set the No Emulation option.
If you are lucky enough to have a two or three button mouse, you don't need to worry about emulation as Chicken supports up to three mouse buttons, as well as scroll-wheels on compatible servers.
The Tint remote display setting will cause the remote displays to be tinted a given color. Tinting creates a visual distinction between the remote and local windows.