Click. To click on an object, you position the pointer over the object and then depress and release the left mouse button without any intervening mouse motion. A Click with the right mouse button is accomplished in a similar fashion.
Control-click. To control-click is the same as to click, except that the keyboard's Ctrl key is held down throughout the operation. Normally a Click with the right mouse button is the same as a Control-click.
Drag. To drag, depress the left mouse button and move the mouse without releasing the mouse button. Dragging can be used to move objects, and to highlight text.
To move an object, position the pointer over the object and drag. As you drag an outline or other indicator will show you where the object will be moved to on completion. Position the outline where you want the object to be and release the mouse button.
To highlight text, position the pointer over the beginning of the text you want to highlight and drag. Let go of the mouse button when the text you want is highlighted.
Highlight. Highlighted objects indicate that they will be used for a special purpose. You can highlight text by dragging over it.
Select. You can select a menu item such as File>Exit by depressing the left mouse button over "File" in the menu-bar and dragging until "Exit" is highlighted and releasing the mouse button. You can also select a menu item by clicking on "File" in the menu bar, and then clicking on "Exit" which, along with the other File commands, will remain visible after your first click on "File."
Shift-click. To shift-click is the same as to click, except that the keyboard's Shift key is held down throughout the operation.