The following refers to the Dock when it is in its default position, which is at the bottom of the screen. I actually recommend putting it on the right in many cases, especially if you have a screen which is wide compared to its height (eg the 16:10 aspect ratio screens used in modern laptops). If you have the Dock on the right the information below which mentions left and right should be read as above and below, etc instead. To move the Dock to the right, control-click or right-click the dividing line and choose "Position on Screen: Right" from the contextual menu. You can also hold down the shift key and drag the dividing line to move the Dock around.
Items get into the dock in several ways. First, the Trash is always in the dock and, except in unusual circumstances, so is the Finder. A line divides the dock into two parts. On the left is space for programs and on the right documents (plus the Trash). Programs automatically appear in the dock when they are launched. You can put a program in the dock without running it by just dragging it there, then you can just click to launch it.
Programs without a black dot (other indicators, like a white dot, or triangle are used in other versions of the OS) under them aren't running. When you minimise a window (click in the yellow button near the top-left of the window) it is "minimised" to the Dock (a miniature version appears in the right side).
You can remove an item from the Dock by just dragging it out. You need to move it a fairly long way - until the word "Remove" appears - to prevent it happening accidentally.
Re-arrange items by dragging them from one place to another. To see the original of an item (in its folder in the Finder) hold down command and click the item. Use right-click, or hold down control and click an item, to see a menu showing special commands the program can do and a list of the program's windows.
I prefer to have the Dock hidden until I need it, but many people like to have it displayed permanently. The advantage of this is you can see useful information about programs in the Dock, such as the number of new email messages. The disadvantage is it uses space which I prefer to use for the actual content I am working on.
I usually write a blog post about once a week. The latest post can be viewed here: Unity Through Division: Sometimes hard decisions need to be made to make genuine progress. (posted 2024-11-18 at 19:13:00). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2024-08-22 Stirring Up Trouble: Let's just get every view out there and fairly debate them..
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