This checkbox controls whether or not the title-bar and edges of a window are included. It is only relevant when Screen-Shooter is taking a picture of a single window rather than of the whole screen or of a rectangle you have selected. The default is for this to be checked and for the title-bar and window borders to be included in the shot.
This checkbox controls whether or not Screen-Shooter will beep when it actually takes the shot. The default is to beep.
This is a checkbox which controls whether some of Screen-Shooter's more esoteric options are available. The default is off (ie they are not available). Checking this option makes two sections called Spurious 1 and Spurious 2 visible in the preferences dialogue.
When taking shots of the desktop, you can set a delay between pressing the panel button and the shot being taken. The delay can be up to one minute. This can be very useful when you want to focus on a particular window or if you want to bring up a menu.
Compression quality does not refer to how tightly a file is compressed, but to how well it retains detail after compression. The higher the compression quality, the better the quality of the image, but the larger the size of the resulting file. It is relevant when you are saving something as a JEPG, a MIFF or a PNG file. The default compression quality is 75%.
A fairly self-explanatory option: if this is selected, the resulting image will be in monochrome. This is off by default.
Another self-explanatory option: if this is selected, the colours of the image are reversed so that white becomes black, pale purple becomes greenish, and so on. Lovely but rarely useful. Off by default.