Adobe InDesign - Choosing The Appropriate Method For Importing Graphics Into Adobe InDesign (2.x/CS)
There are a few ways you can import graphics into InDesign, but you should consider the situation before choosing a method. For example: You should use the Place command if you're importing graphics from other applications and want to maintain a link to the original files and preserve image integrity. When you choose File > Place, you bring up the Place dialog box, which allows you to select the file of your choice and place it in the document. At the bottom of the dialog box, you'll see a check box named Show Import Options. If you enable this check box, you'll get the Image Import Options dialog box specific to the type of graphic that you import after you click Open. For example, if you import a PDF, it allows you to select the pages, crop out areas, and more. If you import a TIFF, it gives you image-and color-setting options.
You can also drag and drop graphics into your documents. The graphics will still appear in the Links palette the same as if you placed them, but you won't be able to specify any import options for them. If you're copying graphics from one InDesign document to another, exact duplicates are created. However, if you're copying graphics from another application into your InDesign document, the integrity of your graphics may be somewhat compromised.
Another option is to copy and paste graphics into InDesign, but this should only be done for placement purposes when importing resolution-dependent images, as integrity may be compromised. Additionally, graphics that are copied and pasted into InDesign won't show up in the Links palette because they're embedded. This is another reason not to copy and paste graphics into your documents, as embedding imported files increases a document's file size, making it unmanageable and subject to memory errors.