When we activate a simple editing command, such as "Copy", Autocad converts the cursor into a small box called "selection box", which we discussed in chapter 2. Selecting objects with this cursor is as simple as pointing to the lines that form and clicking. If we want to add an object to the selection, it is simply pointed out and clicked again, the command line window is telling us how many objects have been selected. If for some reason we have added a wrong object to the selection and do not want to start the selection again, then you have to point it out, press the "SHIFT" key and click, removing it from the selection , the dotted lines that distinguished it disappear. Once "ENTER" is pressed and therefore the selection of objects is finished, the execution of the edit command continues, as will be seen throughout this chapter.