You probably know that LT employs what's known as "noun/verb" selection. This enables you to select an object before beginning a command that will act on that object. (You can turn off this behavior, so that you have to start a command first, through the Options dialog box or the PICKFIRST variable, although I don't know why you'd want to.)
So which is better -- to start the command first, or to pick the objects? In my opinion, you're better off selecting your objects first.
Why? Grips.
All objects have at least one grip (usually more than one) that can be used for stretching, moving, rotating, scaling, or mirroring. Of course, these actions are pretty easy to perform no matter which was started first.
But the real power of grips is with objects like tables, mtext, and dynamic blocks. These have grips with specialized functions, such as changing the height or width of columns, or manipulating a dynamic block parameter. If you start a command before you select one of these objects, you'll never see the grips.
So I recommend getting in the habit of selecting your objects before you start commands -- that way you'll always know your options.


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