Show in mIRC titlebar
This allows you to specify text that will be shown in the mIRC title bar.
This allows you to set the default line-spacing for messages in channels and chat windows.
Note: You can change the line-spacing for individual windows via the System Menu.
This option allows you to choose between using a single line editbox, where the text scrolls to the right when you reach the end of the edit box, or a multi-line editbox, where the text starts again at the left and scrolls downwards. This only affects chat and channel windows, the status window permanently has a single line edit box.
Hint: If you type / into an editbox and press the enter key, it'll show the last line you entered in that editbox. If you type /! it will show the last line you typed in the last window you were in.
Dual monitor support
If you have more than one monitor connected to your computer, you can enable this option to make mIRC display dialogs, popup menus, etc. properly when it is used on different monitors.
Fast text display
Speeds up the display of text in windows by updating less often, this might help avoid display lag in some situations.
Allows you to change the appearance of mIRC in various ways.
Whenever you close or minimize a window, the line marker marks the spot where new messages come in to a channel or query window. This allows you to scroll back and easily see which messages you've missed.
You can press Control+L to scroll back to view the line marker. The line marker is only updated after you've scrolled back to view it.
Allows you to change multi-server related displays settings.
Allows to you to make specific windows open as desktop windows, ie. outside of the main mIRC window. This means you can keep specific windows open on the desktop and keep mIRC minimized at the same time. If you're running mIRC under 2K/XP, you can also enable transparency for any mIRC windows that you place on the desktop.
If hide desktop windows when minimized is enabled, you can hold down the shift key when minimizing to prevent the window from being hidden.
Allows you to change the Tray settings.
Allows you to change the Tips settings.