Mouse

This page contains various options relating to the behavior of the mouse in file displays.

• Allow file selection when clicking to activate Lister: If a Lister is not the active window, clicking on a file display to activate it can have the unintended consequence of altering the file selection state. Turn this option off to prevent a click that activates the Lister from selecting or deselecting files.
• Allow file selection when clicking to switch source/destination state: This option is similar in nature to the Allow file selection when clicking to activate Lister option. If turned on, and you click on a file in the destination file display, the file display will be set to source and the file will be selected. If this option is turned off then although the file display would still be set to source, the file selection in that file display would be unchanged.
• Allow drag and drop into sub-folders: Normally when you drag a file over a sub-folder you can drop it to move or copy it to that folder. If you turn this option off, sub-folders won't appear as drop targets unless you are also holding down the Shift (to move), Control (to copy) or Alt (to make a shortcut) keys. This can be useful if, for example, you have trouble with drag and drop due to physical disability - there's nothing worse than seeing a file vanish into an unknown sub-folder because you dropped it on it accidentally.
• Double-click on file display background: Lets you configure what happens when you double-click the left mouse button on a blank area of the file display. You can choose Go to parent folder, or run a User command that you have previously defined.
• Single click to open an item: This option activates "single-click" mode. In this mode, you select files by hovering over them with the mouse, and open files or folders by single-clicking them, like links on a web page.
• Single middle-click runs Middle double-click File Type event: This option makes Opus treat a single middle-click on a file or folder as if it were a double middle-click. For example, if you turn this option on and configure the Middle double-clickFile Type event for a folder to open it in a new  tab (Go NEWTAB), you can make Opus emulate the behavior of web browsers where middle-clicking a link opens it in a new tab. If this option is turned off then single middle-clicking a file or folder toggles its selection status (which is handy, since it doesn't affect the selection status of other files).
• Smooth scrolling with mouse wheel/keyboard: This option enables smooth scrolling of file displays.